Ceramics Today  

Frits Substitution Chart

kindly supplied by Frank Gaydos

The frits listed on this page are divided into two sections: The first section is a cross reference of some available frits showing where you can substitute among different brands. The second section shows a breakdown of each frit into the Silica/Alumina Ratio, the Molecular Formula,and a Percentage Analysis. Since these formulas were imported from another file I cannot guarantee their accuracy.


Please note: since there may be minor variances in the compariable frit you select, be sure to test the frit before using in production.

 
A Cross Reference List Of Comparable Frits

Pemco 		        O-Hommel    		Ferro

P-54			14			3134

P-25			25			3269

P-830			K-3			3278

Pb-723		        437			3403

Pb-63			24			3417

Pb-83			33			3419

Pb-1307		        11			3470

Pb-1151		        27			3482

Pb-801		        520			3485

Pb-716					        3489

Pb-742		        373			3493

Pb-IK-75		474			3532

Pb-349					        3565

P-311			90			3124

P-1409					        3249

P-786			630			CC-268

P626			400			3289

			450			221-394

Pv-IV-48					FB-179-G

			467			CZ-111

P-802			378			3270

Pb-IR40					        3471

			595			3496

			642			CC-270

			472			FB-268-0

To avoid long scrolling use the direct click links below, left.


Ferro Frit 3110

Cost/lb: $1.00

M.P./F 1400

Silica/Alumina ratio: 31.7:1

Equivalent Molecular Weight:  259.100



Molecular Formula of Ferro Frit 3110:

	K2O   0.064	Al2O3  0.095	SiO2  3.003

	Na2O  0.644	B2O3   0.097	

	CaO   0.293		



     Percentage Analysis

	 69.63 % SiO2 

	  3.73 % Al2O3

	  2.31 % K2O  

	 15.40 % Na2O 

	  6.34 % CaO  

	  2.59 % B2O3 

	______________

	100 % TOTAL

Comments: 10.1 x 10-6 coefficient of thermal expansion (50-450 C)



2.Ferro Frit 3124

Cost/lb: $.60

M.P./F 1600.0

Silica/Alumina ratio: 9.5:1

Equivalent Molecular Weight:  277.500



Molecular Formula of Ferro Frit 3124:

	K2O   0.020	Al2O3  0.269	SiO2  2.555

	Na2O  0.282	B2O3   0.547	

	CaO   0.698		



     Percentage Analysis

	 55.31 % SiO2 

	  9.90 % Al2O3

	  0.70 % K2O  

	  6.30 % Na2O 

	 14.10 % CaO  

	 13.70 % B2O3 

	______________

	100 % TOTAL

Comments: 7.9 x 10-6 coefficient of thermal expansion (50-450 C)



3.Ferro Frit 3134

Cost/lb: $1.00

M.P./F 1450.0

Equivalent Molecular Weight:  190.800



Molecular Formula of Ferro Frit 3134:

	Na2O  0.317	B2O3   0.634	SiO2  1.476

	CaO   0.683		



     Percentage Analysis

	 46.50 % SiO2 

	 10.30 % Na2O 

	 20.10 % CaO  

	 23.10 % B2O3 

	______________

	100 % TOTAL

Comments: 9.6 x 10-6 coefficient of thermal expansion (50-450 C)



4.Ferro Frit 3185

M.P./F 1350.0

Equivalent Molecular Weight:  807.240



Molecular Formula of Ferro Frit 3185:

	K2O   1.000	B2O3   4.430	SiO2  7.270



     Percentage Analysis

	 52.08 % SiO2 

	 11.23 % K2O  

	 36.69 % B2O3 

	______________

	100 % TOTAL

Comments: 6.0 x 10-6 coefficient of thermal expansion (50-450 C)



5.Ferro Frit 3191

M.P./F 1300

Equivalent Molecular Weight:  248.900



Molecular Formula of Ferro Frit 3191:

	Na2O  0.501	B2O3   1.002	SiO2  2.000

	CaO   0.499		



     Percentage Analysis

	 48.29 % SiO2 

	 12.48 % Na2O 

	 11.25 % CaO  

	 27.97 % B2O3 

	______________

	100 % TOTAL

Comments: 9.2 x 10-6coefficient of thermal expansion (50-450 C)



6.Ferro Frit 3193

Silica/Alumina ratio: 11.7:1

Equivalent Molecular Weight:  271.500



Molecular Formula of Ferro Frit 3193:

	K2O   0.074	Al2O3  0.208	SiO2  2.440

	Na2O  0.407	B2O3   0.610	

	CaO   0.519		



     Percentage Analysis

	 53.99 % SiO2 

	  7.81 % Al2O3

	  2.57 % K2O  

	  9.29 % Na2O 

	 10.72 % CaO  

	 15.61 % B2O3 

	______________

	100 % TOTAL

Comments: ? x10 x10-6 Coefficient of expansion 



7.Ferro Frit 3195

Cost/lb: $1.00

M.P./F 1500.1

Silica/Alumina ratio: 6.8:1

Equivalent Molecular Weight:  340.900



Molecular Formula of Ferro Frit 3195:

	Na2O  0.313	Al2O3  0.404	SiO2  2.751

	CaO   0.686	B2O3   1.099	



     Percentage Analysis

	 48.50 % SiO2 

	 12.10 % Al2O3

	  5.70 % Na2O 

	 11.30 % CaO  

	 22.40 % B2O3 

	______________

	100 % TOTAL

Comments: 7.1 x 10-6 coefficient of thermal expansion (50-450 C)



8.Ferro Frit 3211

M.P./F 1750

Equivalent Molecular Weight:  133.400



Molecular Formula of Ferro Frit 3211:

	CaO   1.000	B2O3   1.111	



     Percentage Analysis

	 42.09 % CaO  

	 57.91 % B2O3 

	______________

	100 % TOTAL

Comments: 7.5 x 10-6 coefficient of expansion (50-450 C)



9.Ferro Frit 3221

M.P./F 1450

Silica/Alumina ratio: 3.8:1

Equivalent Molecular Weight:  398.967



Molecular Formula of Ferro Frit 3221:

	K2O   0.175	Al2O3  0.691	SiO2  2.610

	Na2O  0.812	B2O3   1.501	

	CaO   0.013		



     Percentage Analysis

	 39.29 % SiO2 

	 17.66 % Al2O3

	  4.13 % K2O  

	 12.61 % Na2O 

	  0.18 % CaO  

	 26.12 % B2O3 

	______________

	100 % TOTAL

Comments: 9.4 x 10-6 coefficient of expansion (50-450 C)



10.Ferro Frit 3224

M.P./F 1600

Silica/Alumina ratio: 11.0:1

Equivalent Molecular Weight:  1021.178



Molecular Formula of Ferro Frit 3224:

	Na2O  0.879	Al2O3  0.913	SiO2  10.000

	CaO   0.051	B2O3   3.850	

	MgO   0.070		



     Percentage Analysis

	 58.81 % SiO2 

	  9.11 % Al2O3

	  5.34 % Na2O 

	  0.28 % MgO  

	  0.28 % CaO  

	 26.18 % B2O3 

	______________

	100 % TOTAL

Comments: 5.8 x 10-6 coefficient of expansion (50-450 C)



11.Ferro Frit 3225

M.P./F 1650

Silica/Alumina ratio: 13.5:1

Equivalent Molecular Weight:  1232.779



Molecular Formula of Ferro Frit 3225:

	Na2O  0.879	Al2O3  0.991	SiO2  13.340

	CaO   0.055	B2O3   3.893	

	MgO   0.066		



     Percentage Analysis

	 64.99 % SiO2 

	  8.19 % Al2O3

	  4.42 % Na2O 

	  0.22 % MgO  

	  0.25 % CaO  

	 21.93 % B2O3 

	______________

	100 % TOTAL

Comments: 5.0 x 10-6 coefficient of expansion (50-450 C)



12.Ferro Frit 3226

M.P./F 1450

Silica/Alumina ratio: 98.7:1

Equivalent Molecular Weight:  586.550



Molecular Formula of Ferro Frit 3226:

	Na2O  0.693	Al2O3  0.052	SiO2  5.130

	CaO   0.307	B2O3   3.067	



     Percentage Analysis

	 52.53 % SiO2 

	  0.90 % Al2O3

	  7.32 % Na2O 

	  2.94 % CaO  

	 36.31 % B2O3 

	______________

	100 % TOTAL

Comments: 6.3 x 10-6 coefficient of expansion (50-450 C)



13.Ferro Frit 3227

M.P./F 1300

Silica/Alumina ratio: 4.2:1

Equivalent Molecular Weight:  372.807



Molecular Formula of Ferro Frit 3227:

	K2O   0.162	Al2O3  0.568	SiO2  2.360

	Na2O  0.838	B2O3   1.526	



     Percentage Analysis

	 38.02 % SiO2 

	 15.53 % Al2O3

	  4.09 % K2O  

	 13.93 % Na2O 

	 28.42 % B2O3 

	______________

	100 % TOTAL

Comments: 9.8 x 10-6 coefficient of expansion (50-450 C)



14.Ferro Frit 3240

M.P./F 1500

Silica/Alumina ratio: 75.6:1

Equivalent Molecular Weight:  207.205



Molecular Formula of Ferro Frit 3240:

	K2O   0.012	Al2O3  0.018	SiO2  1.360

	Na2O  0.152	B2O3   0.295	ZrO2  0.172

	CaO   0.326		F     0.209

	ZnO   0.403		

	BaO   0.107		



     Percentage Analysis

	 39.42 % SiO2 

	  0.89 % Al2O3

	  0.55 % K2O  

	  4.55 % Na2O 

	  8.82 % CaO  

	  7.92 % BaO  

	 15.83 % ZnO  

	  9.89 % B2O3 

	 10.23 % ZrO2  

	  1.92 % F     

	______________

	100 % TOTAL

Comments: 8.6 x 10-6 coefficient of thermal expansion (50-450 C)



15.Ferro Frit 3247

M.P./F 1850

Silica/Alumina ratio: 13.3:1

Equivalent Molecular Weight:  288.827



Molecular Formula of Ferro Frit 3247:

	BaO   1.000	Al2O3  0.150	SiO2  2.001



Percentage Analysis

	 41.60 % SiO2 

	  5.30 % Al2O3

	 53.10 % BaO  

	______________

	100 % TOTAL

Comments: 8.6 x10-6 Coefficient of expansion 



16.Ferro Frit 3248

M.P./F 1900

Silica/Alumina ratio: 7.2:1

Equivalent Molecular Weight:  411.346



Molecular Formula of Ferro Frit 3248:

	K2O   0.307	Al2O3  0.609	SiO2  4.410

	Na2O  0.108	B2O3   0.276	

	CaO   0.383		

	MgO   0.202		



     Percentage Analysis

	 64.39 % SiO2 

	 15.09 % Al2O3

	  7.03 % K2O  

	  1.63 % Na2O 

	  1.98 % MgO  

	  5.22 % CaO  

	  4.66 % B2O3 

	______________

	100 % TOTAL

Comments: 6.8 x 10-6 coefficient of thermal expansion (50-450 C)



17.Ferro Frit 3249

M.P./F 1900

Silica/Alumina ratio: 5.4:1

Equivalent Molecular Weight:  274.200



Molecular Formula of Ferro Frit 3249:

	CaO   0.171	Al2O3  0.357	SiO2  1.920

	MgO   0.829	B2O3   1.140	



     Percentage Analysis

	 42.10 % SiO2 

	 13.30 % Al2O3

	 12.20 % MgO  

	  3.50 % CaO  

	 28.90 % B2O3 

	______________

	100 % TOTAL

Comments: 4.0 x 10-6 coefficient of thermal expansion (50-450 C) 



18.Ferro Frit 3264

M.P./F 1400

Silica/Alumina ratio: 12.9:1

Equivalent Molecular Weight:  291.087



Molecular Formula of Ferro Frit 3264:

	Na2O  0.984	Al2O3  0.192	SiO2  2.470

	CaO   0.005	B2O3   0.885	

	MgO   0.011		



     Percentage Analysis

	 50.96 % SiO2 

	  6.72 % Al2O3

	 20.95 % Na2O 

	  0.15 % MgO  

	  0.10 % CaO  

	 21.11 % B2O3 

	______________

	100 % TOTAL

Comments: 11.0 x 10-6 coefficient of expansion (50-450 C)



19.Ferro Frit 3269

M.P./F 1400

Silica/Alumina ratio: 6.4:1

Equivalent Molecular Weight:  356.634



Molecular Formula of Ferro Frit 3269:

	K2O   0.306	Al2O3  0.462	SiO2  2.950

	Na2O  0.641	B2O3   0.778	F     0.300

	CaO   0.009		

	ZnO   0.044		



     Percentage Analysis

	 49.68 % SiO2 

	 13.21 % Al2O3

	  8.08 % K2O  

	 11.14 % Na2O 

	  0.14 % CaO  

	  1.00 % ZnO  

	 15.15 % B2O3 

	  1.60 % F     

	______________

	100 % TOTAL

Comments: 10.0 x 10-6 coefficient of expansion (50-450 C)



20.Ferro Frit 3270

M.P./F 1500

Silica/Alumina ratio: 10.1:1

Equivalent Molecular Weight:  273.569



Molecular Formula of Ferro Frit 3270:

	K2O   0.159	Al2O3  0.232	SiO2  2.340

	Na2O  0.380	B2O3   0.648	

	CaO   0.461		



     Percentage Analysis

	 51.37 % SiO2 

	  8.65 % Al2O3

	  5.47 % K2O  

	  8.61 % Na2O 

	  9.45 % CaO  

	 16.45 % B2O3 

	______________

	100 % TOTAL

Comments: 9.4 x 10-6 coefficient of expansion (50-450 C)



21.Ferro Frit 3271

M.P./F 1500

Equivalent Molecular Weight:  247.577



Molecular Formula of Ferro Frit 3271:

	Na2O  0.514	B2O3   0.768	SiO2  2.250

	CaO   0.486		



     Percentage Analysis

	 54.58 % SiO2 

	 12.87 % Na2O 

	 11.01 % CaO  

	 21.54 % B2O3 

	______________

	100 % TOTAL

Comments: 9.3 x 10-6 coefficient of expansion (50-450 C)



22.Ferro Frit 3278

M.P./F 1400

Equivalent Molecular Weight:  270.447



Molecular Formula of Ferro Frit 3278:

	Na2O  0.669	B2O3   0.842	SiO2  2.530

	CaO   0.331		



     Percentage Analysis

	 56.19 % SiO2 

	 15.33 % Na2O 

	  6.86 % CaO  

	 21.62 % B2O3 

	______________

	100 % TOTAL

Comments: 9.7 x 10-6 coefficient of expansion (50-450 C)



23.Ferro Frit 3286

M.P./F 1750

Silica/Alumina ratio: 16.5:1

Equivalent Molecular Weight:  289.525



Molecular Formula of Ferro Frit 3286:

	K2O   0.104	Al2O3  0.176	SiO2  2.900

	Na2O  0.080	B2O3   0.367	

	CaO   0.576		

	SrO   0.240		



     Percentage Analysis

	 60.16 % SiO2 

	  6.20 % Al2O3

	  3.38 % K2O  

	  1.71 % Na2O 

	 11.16 % CaO  

	  8.59 % SrO  

	  8.80 % B2O3 

	______________

	100 % TOTAL

Comments: 7.5 x 10-6 coefficient of thermal expansion (50-450 C)



23A.Ferro Frit 3288

Mol Wt: 225.5

Fusion temp 1800 F

Molecular Formula:

	Na2O   0.31	AL2O3   0.11	SiO2  1.89

	K2O     0.01	B2O3      0.61 		 

	CaO     0.68

Percentage Analysis:

	50.36 %   SiO2

	  4.97 %  Al2O3     

	  0.42 %  K2O

	  8.52 %  Na2O 

	16.91 %  CaO

	18.82 %  B2O3

Comments: similar frits - Fusion F-65, Glostex GF-103



24.Ferro Frit 3289

M.P./F 1500

Silica/Alumina ratio: 15.5:1

Equivalent Molecular Weight:  374.127



Molecular Formula of Ferro Frit 3289:

	Na2O  0.332	Al2O3  0.198	SiO2  3.070

	BaO   0.668	B2O3   0.668	



     Percentage Analysis

	 49.30 % SiO2 

	  5.40 % Al2O3

	  5.50 % Na2O 

	 27.40 % BaO  

	 12.40 % B2O3 

	______________

	100 % TOTAL

Comments: 8.2 x 10-6 coefficient of thermal expansion (50-450 C) 



25.Ferro Frit 3291

Silica/Alumina ratio: 

Equivalent Molecular Weight:  332.184



Molecular Formula of Ferro Frit 3291:

	CaO   0.123	Al2O3  0.430	SiO2  2.510

	MgO   0.877	B2O3   1.373

	

     Percentage Analysis

	 45.38 % SiO2 

	 13.20 % Al2O3

	 10.64 % MgO  

	  2.08 % CaO  

	 28.70 % B2O3 

	______________

	100 % TOTAL

Comments: 3.9 x 10-6 coefficient of expansion (50-450 C)



26.Ferro Frit 3292

Silica/Alumina ratio: 9.7:1

Equivalent Molecular Weight:  334.600



Molecular Formula of Ferro Frit 3292:

	K2O   0.110	Al2O3  0.351	SiO2  3.399

	Na2O  0.162	B2O3   0.274	

	CaO   0.626		

	MgO   0.058		

	Li2O  0.045		

	SrO   0.134		



     Percentage Analysis

	 61.49 % SiO2 

	 10.77 % Al2O3

	  3.12 % K2O  

	  3.02 % Na2O 

	  0.71 % MgO  

	 10.57 % CaO  

	  4.18 % SrO  

	  0.40 % Li2O 

	  5.74 % B2O3 

	______________

	100 % TOTAL

Comments: ? x10-6 Coefficient of expansion 





101.Ferro Frit 3293

Mol Wt: 341.5

Molecular Formula:

	Na2O  0.920	Al2O3  0.198	SiO2  4.342

	MgO  0.068	

	CaO    0.012

Percentage Analysis:

	76.4%   SiO2

	  5.9 %  Al2O3

	16.7 %  Na2O

	  0.2 %  CaO

	  0.8 %  MgO 

Comments: Sodium silicate frit - no boron; similar frits - Pemco 283



27.Ferro Frit 3300

M.P./F 1700

Silica/Alumina ratio: 7.2:1

Equivalent Molecular Weight:  207.400



Molecular Formula of Ferro Frit 3300:

	K2O   0.071	Al2O3  0.187	SiO2  1.340

	Na2O  0.025		

	CaO   0.326		

	MgO   0.022		

	ZnO   0.267		

	BaO   0.083		

	PbO   0.206		



     Percentage Analysis

	 38.81 % SiO2 

	  9.19 % Al2O3

	  3.22 % K2O  

	  0.75 % Na2O 

	  0.43 % MgO  

	  8.82 % CaO  

	  6.14 % BaO  

	 22.17 % PbO  

	 10.48 % ZnO  

	______________

	100 % TOTAL

Comments: 8.3 x10-6 Coefficient of expansion 

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



28.Ferro Frit 3403

M.P./F 1500

Silica/Alumina ratio: 20.7:1

Equivalent Molecular Weight:  307.500



Molecular Formula of Ferro Frit 3403:

	K2O   0.046	Al2O3  0.069	SiO2  1.439

	Na2O  0.015		

	CaO   0.006		

	PbO   0.934		



     Percentage Analysis

	 28.10 % SiO2 

	  2.30 % Al2O3

	  1.40 % K2O  

	  0.30 % Na2O 

	  0.10 % CaO  

	 67.79 % PbO  

	______________

	100 % TOTAL

Comments: 7.2 x10-6 Coefficient of expansion 

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.





28A.Ferro Frit 3304

Mol Wt: 382.5

Fusion temp:1500 F

Molecular Formula:

	Na2O   0.07	Al2O3   0.15	SiO2   2.58

	PbO     0.93	

Percentage Analysis: 

	40.5 %  SiO2

	  1.1 %  Na2O

	54.4 %  PbO

Comments: 6.6 x 10-6 coefficient of expansion; similar frits - Hommel 61



28B.Ferro Frit 3396

Mol Wt: 331.7

Fusion temp: 1300 F

Molecular Formula:

	Na2O  0.502	B2O3  1.004	SiO2  1.99

	PbO    .498	

Percentage Analysis:

	36.1 %   SiO2  

	  9.4 %   Na2O

	33.5 %   PbO

	21.0 %   B2O3

Comments: Source -  William Hunt in Ceramics Monthly May 1978 26 (5) p.48-54;  8.3 x 10-6 coefficient of expansion



29.Ferro Frit 3417

M.P./F 1400.0

Silica/Alumina ratio: 24.6:1

Equivalent Molecular Weight:  382.527



Molecular Formula of Ferro Frit 3417:

	K2O   0.077	Al2O3  0.113	SiO2  2.780

	Na2O  0.095	B2O3   0.691	ZrO2  0.075

	CaO   0.306		

	PbO   0.522		



     Percentage Analysis

	 43.65 % SiO2 

	  3.01 % Al2O3

	  1.90 % K2O  

	  1.54 % Na2O 

	  4.49 % CaO  

	 30.46 % PbO  

	 12.54 % B2O3 

	  2.42 % ZrO2  

	______________

	100 % TOTAL

Comments: 6.7 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



30.Ferro Frit 3419

M.P./F 1000

Equivalent Molecular Weight:  271.362



Molecular Formula of Ferro Frit 3419:

	Na2O  0.280	B2O3   0.567	SiO2  0.899

	PbO   0.720		



     Percentage Analysis

	 19.90 % SiO2 

	  6.40 % Na2O 

	 59.20 % PbO  

	 14.50 % B2O3 

	______________

	100 % TOTAL

Comments: 8.2 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



31.Ferro Frit 3435

M.P./F 1300

Silica/Alumina ratio: 32.8:1

Equivalent Molecular Weight:  302.572



Molecular Formula of Ferro Frit 3435:

	K2O   0.045	Al2O3  0.065	SiO2  2.146

	Na2O  0.210	B2O3   0.710	

	CaO   0.394		

	PbO   0.351

	

     Percentage Analysis

	 42.60 % SiO2 

	  2.20 % Al2O3

	  1.40 % K2O  

	  4.30 % Na2O 

	  7.30 % CaO  

	 25.89 % PbO  

	 16.30 % B2O3 

	______________

	100 % TOTAL

Comments: 7.5 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



32.Ferro Frit 3454

M.P./F 1450.0

Silica/Alumina ratio: 10.1:1

Equivalent Molecular Weight:  708.228



Molecular Formula of Ferro Frit 3454:

	K2O   0.120	Al2O3  0.480	SiO2  4.846

	Na2O  0.217	B2O3   3.121	

	CaO   0.126		

	PbO   0.536

		

     Percentage Analysis

	 41.10 % SiO2 

	  6.90 % Al2O3

	  1.60 % K2O  

	  1.90 % Na2O 

	  1.00 % CaO  

	 16.90 % PbO  

	 30.60 % B2O3 

	______________

	100 % TOTAL

Comments: 5.5 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.





33.Ferro Frit 3465

M.P./F 1600

Equivalent Molecular Weight:  265.314

Molecular Formula of Ferro Frit 3465:

	Na2O  0.616	B2O3   0.772	SiO2  2.319

	CaO   0.308		

	PbO   0.076		

     Percentage Analysis

	 52.50 % SiO2 

	 14.40 % Na2O 

	  6.50 % CaO  

	  6.40 % PbO  

	 20.20 % B2O3 

	______________

	100 % TOTAL

Comments: 9.7 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



33A.Ferro Frit 3466

Mol Wt: 329.0

Fusion temp: 1500 F

Molecular Formula:

	K2O    0.049	Al2O3  0.287	SiO2  2.89	

	Na2O  0.143	B2O3    0.266

	CaO    0.418

	BaO    0.033

	ZnO    0.096

	PbO    0.261

Percentage Analysis:

	52.7 %  SiO2

	  8.9 %  Al2O3

	  1.4 %  K2O	

	  2.7 %  Na2O

	  7.1 %  Cao

	  1.5 %  BaO

	  2.4 %  ZnO

	17.7 % PbO

	  5.6 %  B2O3

Comments: Source - William Hunt in Ceramics Monthly May 1978 26 (5) p. 48-54;  7.2 x 10-6 coefficient of expansion



33B.Ferro Frit 3467

Mol Wt: 343.5 

Fusion temp: 1700 F

Molecular Analysis:

	K2O    0.06	Al2O3  0.31	SiO2  3.23

	Na2O  0.13	B2O30.22	

	CaO    0.49	

	MgO  0.05

	PbO   0.26

Percentage Analysis:

	56.5 %  SiO2

	  9.1 %  Al2O3

	  1.7 %  K2O

	  2.4 %  Na2O

	  0.6 %  MgO

	17.2 %  PbO

	  4.5 %  B2O3

Comments: Lead borosilicate frit.  6.9 x 10-6 coefficient of expansion; similar frits - Pemco Pb2F-35, Hommel 365 

 	    and Fusion FL-17





33C.Ferro Frit 3470

Mol Wt: 232.0

Fusion temp: 1350 F

Molecular Analysis:

	Na2O   0.08	Al2O3   0.13	SiO2   1.07

	CaO     0.23	B2O3     0.28	

	ZnO    0.26

	PbO    0.43

Percentage Analysis:

	27.7 %  SiO2

	  5.8 %  Al2O3

	  2.2 %  Na2O3

	  5.6 %  CaO

	  9.0 %  ZnO

	41.2 %  PbO

	  8.5 %  B2O3

Comments: Lead zinc borosilicate frit;  7.5 x 10-6 coefficient of expansion; similar frits - Fusion F2-24, Pemco Pb1307 and	     	     Hommel 11





34.Ferro Frit 3471

M.P./F 1500

Silica/Alumina ratio: 12.5:1

Equivalent Molecular Weight:  259.064



Molecular Formula of Ferro Frit 3471:

	K2O   0.071	Al2O3  0.099	SiO2  1.238

	Na2O  0.021	B2O3   0.459	

	CaO   0.300		

	BaO   0.253		

	PbO   0.354		



     Percentage Analysis

	 28.70 % SiO2 

	  3.90 % Al2O3

	  2.60 % K2O  

	  0.50 % Na2O 

	  6.50 % CaO  

	 15.00 % BaO  

	 30.49 % PbO  

	 12.30 % B2O3 

	______________

	100 % TOTAL

Comments: 8.0 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



35.Ferro Frit 3476

M.P./F 1050

Equivalent Molecular Weight:  352.610



Molecular Formula of Ferro Frit 3476:

	PbO   1.000	B2O3   1.005	SiO2  0.992



Percentage Analysis

	 16.90 % SiO2 

	 63.30 % PbO  

	 19.80 % B2O3 

	______________

	100 % TOTAL

Comments: 6.0 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



35A.Ferro Frit 3481

Mol Wt: 293.1

Fusion temp: 

Molecular Formula:

	K2O   0.037	Al2O3  0.201	SiO2  2.432

	Na2O 0.146	B2O3   0.261

	CaO   0.517

	Pbo   0.299

Percentage Analysis:

	49.9 %  SiO2

	  7.0 %  Al2O3

	  1.2 %  K2O

	  3.1 %  Na2O

	  9.9 %  CaO

	22.8 %  PbO

	  6.2 %  B2O3

Comments: Calcium / lead borosilicate frit; similar frits - Hommel 403



35B.Ferro Frit 3482

Mol Wt: 365.5

Fusion temp: 1400 F

Molecular Formula: 

	K2O   0.152	B2O3  0.318	SiO2  2.62  

	Na2O 0.159			TiO2  0.442

	CaO   0.212			F        0.424

	PbO   0.477

Percentage Analysis:

	43.1 %  SiO2

	  3.9 %  K2O

	  2.7 %  Na2O

	  3.3 %  CaO

	29.1 %  PbO

	  6.0 %  B2O3

	  9.7 %  TiO2

	  2.2 %  F

Comments: Source - William Hunt in Ceramics Monthly May 1978 26 (5) p. 48-54;  8.3 x 10-6 coefficient of expansion



36.Ferro Frit 3485

M.P./F 1300

Equivalent Molecular Weight:  335.807

Molecular Formula of Ferro Frit 3485:

	Na2O  0.330	B2O3   0.667	SiO2  1.990

	PbO   0.670		

     Percentage Analysis

	 35.60 % SiO2 

	  6.10 % Na2O 

	 44.51 % PbO  

	 13.80 % B2O3 

	______________

	100 % TOTAL

Comments: 7.7 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



36A.Ferro Frit 3489

Mol Wt: 248.3

Fusion temp: 1500 F

Molecular Formula:

	Cao   0.248			SiO2  1.108

	PbO  0.752

Percentage Analysis:

	26.8 %  SiO2

	  5.6 %  Cao

	67.6 %  PbO

Comments: Lead / calcium silicate;  7.3 x 10-6 coefficient of expansion; similar frits - Pemco Pb716 and Pb742, Hommel 373



37.Ferro Frit 3493

M.P./F 1500

Silica/Alumina ratio: 24.5:1

Equivalent Molecular Weight:  375.093

Molecular Formula of Ferro Frit 3493:

	K2O   0.076	Al2O3  0.114	SiO2  2.792

	Na2O  0.091	B2O3   0.697	

	CaO   0.308		

	PbO   0.526		

     Percentage Analysis

	 44.70 % SiO2 

	  3.10 % Al2O3

	  1.90 % K2O  

	  1.50 % Na2O 

	  4.60 % CaO  

	 31.30 % PbO  

	 12.90 % B2O3 

	______________

	100 % TOTAL

Comments: 6.7 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing practices for lead glazes.



37A.Ferro Frit 3496

Mol Wt: 361.5

Fusion temp: 1400 F

Molecular Formula: 

	K2O   0.05	Al2O3  0.17	SiO2  3.00

	Na2O 0.14	B2O3   0.22

	CaO   0.27

	PbO   0.54

Percentage Analysis:

	49.7 %  SiO2

	  4.9 %  Al2O3

	  1.4 %  K2O

	  2.4 %  Na2O

	  4.2 %  CaO

	33.1 %  PbO

	  4.3 %  B2O3

Comments: 7.1 x 10-6 coefficient of expansion; similar frits - Pemco Pb-742, Hommel 373, Fusion FL-28



STRONG>37B.Ferro Frit 3498

Raw Weight:  341.81

Analysis & Unity Formula: 

  	PbO      ...  65.30%  [1.00]     

  	Al2O3  ...    2.50%  [0.08]

  	SiO2    ...   32.20%  [1.83]

Comments: Contains lead; Hammond B300 is similar (from Tony Hansen, Clayart archives 11 Mar 98)





37C.Ferro Frit 3516

Mol Wt: 236.1

Fusion temp: 1400 F 

Molecular Formula:

	K2O    0.044	Al2O3  0.061	SiO2  1.24

	Na2O  0.040	B2O3   0.442

	CaO    0.517

	MgO  0.001

	PbO   0.398

Percentage Analysis:

	31.6 %  SiO2

	  2.6 %  Al2O3

	  1.8 %  K2O

	  1.1 %  Na2O

	12.3 %  CaO

	trace     MgO

	37.6 %  Pbo

	13.0 %  B2O3

Comments: Source William Hunt in Ceramics Monthly May 1978  26(5) p.48-54; 7.6 x 10-6 coefficient of expansion



37D.Ferro Frit 3565

Mol Wt: 326.9  

Fusion temp: 1600 F

Molecular Formula: 

	K2O   0.104	Al2O3  0.180	SiO2   2.938

	Na2O 0.084	B2O3    0.366	ZrO2  0.055

	CaO   0.577

	PbO   0.234

Percentage Analysis:

	54.0 %  SiO2

	  5.6 %  Al2O3

	  1.6 %  K2O

	  3.0 %  Na2O

	  9.9 %  CaO

	16.0 %  PbO

	  7.8 %  B2O3

	  2.1 %  ZrO2

Comments: Lead borosilicate frit for use in glazes ^01 - ^5; 7.2 x 10-6 coefficient of expansion; similar frits -  GF-18





38.Ferro Frit 3576

M.P./F 1500

Silica/Alumina ratio: 19.6:1

Equivalent Molecular Weight:  339.301

Molecular Formula of Ferro Frit 3576:

	Na2O  0.208	Al2O3  0.116	SiO2  2.283

	CaO   0.291	B2O3   0.670	ZrO2  0.022

	PbO   0.501		

     Percentage Analysis

	 40.41 % SiO2 

	  3.50 % Al2O3

	  3.80 % Na2O 

	  4.80 % CaO  

	 32.99 % PbO  

	 13.70 % B2O3 

	  0.80 % ZrO2  

	______________

	100 % TOTAL

Comments: 7.1 x 10-6 coefficient of expansion (50-450 C)

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD. Follow safe firing 

practices for lead glazes.



<

39.Ferro Frit 3814

M.P./F 1500

Silica/Alumina ratio: 17.0:1

Equivalent Molecular Weight:  225.138

Molecular Formula of Ferro Frit 3814:

	K2O   0.009	Al2O3  0.110	SiO2  1.870

	Na2O  0.315	B2O3   0.624	

	CaO   0.676		

     Percentage Analysis

	 49.89 % SiO2 

	  4.98 % Al2O3

	  0.38 % K2O  

	  8.67 % Na2O 

	 16.84 % CaO  

	 19.25 % B2O3 

	______________

	100 % TOTAL

Comments: 8.9 x 10-6 coefficient of expansion (50-450 C)



40.FerroFrit 3819

Cost/lb: $.90

M.P./F 1400

Silica/Alumina ratio: 6.4:1

Equivalent Molecular Weight:  324.200

Molecular Formula of Ferro Frit 3819:

	K2O   0.252	Al2O3  0.407	SiO2  2.615

	Na2O  0.691	B2O3   0.787	

	CaO   0.018		

	ZnO   0.040		

     

Percentage Analysis

	 48.48 % SiO2 

	 12.81 % Al2O3

	  7.31 % K2O  

	 13.21 % Na2O 

	  0.30 % CaO  

	  1.02 % ZnO  

	 16.87 % B2O3 

	______________

	100 % TOTAL

Comments: 10.3 x10-6 Coefficient of expansion 



41.Ferro Frit 3820

M.P./F 1650

Silica/Alumina ratio: 6.6:1

Equivalent Molecular Weight:  254.981

Molecular Formula of Ferro Frit 3820:

	K2O   0.220	Al2O3  0.326	SiO2  2.160

	Na2O  0.210	B2O3   0.170	ZrO2  0.060

	CaO   0.240		

	MgO   0.030		

	ZnO   0.300		

     Percentage Analysis

	 50.88 % SiO2 

	 13.03 % Al2O3

	  8.13 % K2O  

	  5.10 % Na2O 

	  0.47 % MgO  

	  5.28 % CaO  

	  9.57 % ZnO  

	  4.63 % B2O3 

	  2.90 % ZrO2  

	______________

	100 % TOTAL

Comments: 9.2 x 10-6 coefficient of thermal expansion (50-450 C)



42.Ferro Frit 3824

M.P./F 1400

Equivalent Molecular Weight:  235.796



Molecular Formula of Ferro Frit 3824:

	Na2O  0.347	B2O3   0.988	SiO2  1.620

	CaO   0.188		

	ZnO   0.465		



     Percentage Analysis

	 41.26 % SiO2 

	  9.12 % Na2O 

	  4.47 % CaO  

	 16.05 % ZnO  

	 29.10 % B2O3 

	______________

	100 % TOTAL

Comments: 8.3 x 10-6 coefficient of expansion (50-450 C)



43.Ferro Frit 3831

M.P./F 1700

Silica/Alumina ratio: 6.8:1

Equivalent Molecular Weight:  186.233



Molecular Formula of Ferro Frit 3831:

	K2O   0.238	Al2O3  0.194	SiO2  1.320

	Na2O  0.139		

	CaO   0.405		

	BaO   0.218		



     Percentage Analysis

	 42.57 % SiO2 

	 10.62 % Al2O3

	 12.04 % K2O  

	  4.63 % Na2O 

	 12.20 % CaO  

	 17.95 % BaO  

	______________

	100 % TOTAL

Comments: 11.9 x 10-6 coefficient of thermal expansion (50-450 C)



44.Ferro Frit 3851

M.P./F 2400

Silica/Alumina ratio: 3.1:1

Equivalent Molecular Weight:  166.974



Molecular Formula of Ferro Frit 3851:

	CaO   0.014	Al2O3  0.439	SiO2  1.360

	MgO   0.986		



     Percentage Analysis

	 48.92 % SiO2 

	 26.80 % Al2O3

	 23.81 % MgO  

	  0.47 % CaO  

	______________

	100 % TOTAL

Comments: 4.2 x 10-6 coefficient of thermal expansion (50-450 C)



44A.Ferro Frit 4364

Molecular Formula:

	PbO  1.0		Al2o3  0.09	SiO2  1.95

Percentage Analysis:

	33.57 %  SiO2

	  2.48 %  Al2O3

	63.94 %  PbO

Comments: ? source of data





45.Ferro Frit 5301

Cost/lb: $1.00

M.P./F 1500

Silica/Alumina ratio: 6.3:1

Equivalent Molecular Weight:  247.144



Molecular Formula of Ferro Frit 5301:

	K2O   0.134	Al2O3  0.274	SiO2  1.720

	Na2O  0.765	B2O3   0.418	F     1.115

	CaO   0.101		



     Percentage Analysis

	 41.80 % SiO2 

	 11.30 % Al2O3

	  5.11 % K2O  

	 19.19 % Na2O 

	  2.29 % CaO  

	 11.74 % B2O3 

	  8.57 % F     

	______________

	100 % TOTAL

Comments: 11.6 x10-6 Coefficient of expansion 



46.Ferro Frit CC257

Mol Wt: 280.6

Molecular Formula:

	K2O   0.045	Al2O3  0.253	SiO2  2.177

	Na2O 0.024			TiO2  0.077

	CaO   0.275

	MgO 0.022

	SrO   0.015

	BaO  0.619

Percentage Analysis: 

	46.60 %  SiO2

	  9.20 %  Al2O3

	  0.79 %  K2O

	  1.00 %  Na2O

	  5.50 %  CaO 

	  0.31 %  MgO

	33.80 %  BaO

	  0.57 %  SrO

	  2.20 %  TiO2



47.Glass - window

Silica/Alumina ratio: 247.1:1

Equivalent Molecular Weight:  212.046



Molecular Formula of Glass - window:

	K2O   0.002	Al2O3  0.010	SiO2  2.570

	Na2O  0.464	B2O3   0.003	SO3   0.008

	CaO   0.323	Fe2O3  0.001	

	MgO   0.211		



     Percentage Analysis

	 72.79 % SiO2 

	  0.50 % Al2O3

	  0.10 % K2O  

	 13.55 % Na2O 

	  4.02 % MgO  

	  8.54 % CaO  

	  0.10 % B2O3 

	  0.10 % Fe2O3

	  0.30 % SO3  

	______________

	100 % TOTAL

Comments: Average (approximate) analysis for window-type glass.



48.Ground Glass

Silica/Alumina ratio: 60.3:1

Equivalent Molecular Weight:  242.381



Molecular Formula of Ground Glass:

	K2O   0.026	Al2O3  0.047	SiO2  2.865

	Na2O  0.508	B2O3   0.105	

	CaO   0.346		

	MgO   0.120		



     Percentage Analysis

	 71.00 % SiO2 

	  2.00 % Al2O3

	  1.00 % K2O  

	 13.00 % Na2O 

	  2.00 % MgO  

	  8.00 % CaO  

	  3.00 % B2O3 

	______________

	100 % TOTAL

Comments: An estimated analysis of your average window glass. 



49.Hommel Frit 14

M.P./F 1720

Equivalent Molecular Weight:  190.900



Molecular Formula of Hommel Frit 14:

	Na2O  0.319	B2O3   0.639	SiO2  1.473

	CaO   0.681		



     Percentage Analysis

	 46.36 % SiO2 

	 10.36 % Na2O 

	 20.02 % CaO  

	 23.26 % B2O3 

	______________

	100 % TOTAL

Comments: 9.2 x10-6 Coefficient of expansion  melting range 1720 F A close substitute for Ferro Frit 3134





50.Hommel Frit 24

Equivalent Molecular Weight:  353.200



Molecular Formula of Hommel Frit 24:

	Na2O  0.186	Al2O3  0.109	SiO2  2.571

	CaO   0.305	B2O3   0.653	

	PbO   0.509		



     Percentage Analysis

	 43.74 % SiO2 

	  3.15 % Al2O3

	  3.27 % Na2O 

	  4.85 % CaO  

	 32.15 % PbO  

	 12.85 % B2O3 

	______________

	100 % TOTAL

Comments: 7.5 x10-6 Coefficient of expansion 

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD.



51.Hommel Frit 259

M.P./F 1500

Silica/Alumina ratio: 7.1:1

Equivalent Molecular Weight:  324.203



Molecular Formula of Hommel Frit 259:

	K2O   0.208	Al2O3  0.374	SiO2  2.639

	Na2O  0.739	B2O3   0.770	F     0.247

	CaO   0.016		

	ZnO   0.038		



     Percentage Analysis

	 48.91 % SiO2 

	 11.75 % Al2O3

	  6.04 % K2O  

	 14.14 % Na2O 

	  0.27 % CaO  

	  0.94 % ZnO  

	 16.50 % B2O3 

	  1.45 % F     

	

	100 % TOTAL

Comments: 10.3 x10-6 Coefficient of expansion 



52.Hommel Frit 33

M.P./F 1225.0

Equivalent Molecular Weight:  273.300



Molecular Formula of Hommel Frit 33:

	Na2O  0.282	B2O3   0.565	SiO2  0.934

	PbO   0.718		



     Percentage Analysis

	 20.54 % SiO2 

	  6.39 % Na2O 

	 58.71 % PbO  

	 14.36 % B2O3 

	______________

	100 % TOTAL

Comments: 10.9 x10-6 Coefficient of expansion  O. Hommel Co.

Potential Health Hazards:

contains Lead - avoid ingestion. DO NOT USE FOR WARE INTENDED FOR FOOD.



53.Hommel Frit 529

M.P./F 1400

Silica/Alumina ratio: 28.8:1

Equivalent Molecular Weight:  253.300



Molecular Formula of Hommel Frit 529:

	K2O   0.057	Al2O3  0.101	SiO2  2.900

	Na2O  0.680	B2O3   0.095	

	CaO   0.263		



     Percentage Analysis

	 68.76 % SiO2 

	  4.05 % Al2O3

	  2.11 % K2O  

	 16.65 % Na2O 

	  5.82 % CaO  

	  2.61 % B2O3 

	______________

	100 % TOTAL

Comments: 9.6 x10-6 Coefficient of expansion - a close substitute for Ferro Frit 3110



54.Hommel Frit 90

M.P./F 1550

Silica/Alumina ratio: 9.6:1

Equivalent Molecular Weight:  267.200



Molecular Formula of Hommel Frit 90:

	K2O   0.012	Al2O3  0.255	SiO2  2.440

	Na2O  0.273	B2O3   0.535	

	CaO   0.665		

	MgO   0.050		



     Percentage Analysis

	 54.86 % SiO2 

	  9.74 % Al2O3

	  0.42 % K2O  

	  6.33 % Na2O 

	  0.76 % MgO  

	 13.97 % CaO  

	 13.92 % B2O3 

	______________

	100 % TOTAL

Comments: 7.7 x10-6 Coefficient of expansion  - a close substitute for Ferro Frit 3124



55.Hommel Frit G26

M.P./F 1480

Silica/Alumina ratio: 75.1:1

Equivalent Molecular Weight:  207.836



Molecular Formula of Hommel Frit G26:

	K2O   0.010	Al2O3  0.019	SiO2  1.389

	Na2O  0.154	B2O3   0.299	ZrO2  0.173

	CaO   0.323		F     0.124

	ZnO   0.403		

	BaO   0.109		



     Percentage Analysis

	 40.14 % SiO2 

	  0.91 % Al2O3

	  0.47 % K2O  

	  4.60 % Na2O 

	  8.72 % CaO  

	  8.04 % BaO  

	 15.79 % ZnO  

	  9.97 % B2O3 

	 10.24 % ZrO2  

	  1.13 % F     

	______________

	100 % TOTAL

Comments: 7.0 x 10-6 coefficient of thermal expansion (50-450 C)



56.Hommel Frit K3

M.P./F 1450

Equivalent Molecular Weight:  274.218



Molecular Formula of Hommel Frit K3:

	Na2O  0.669	B2O3   0.864	SiO2  2.568

	CaO   0.331

		

Percentage Analysis

	 56.24 % SiO2 

	 15.12 % Na2O 

	  6.77 % CaO  

	 21.87 % B2O3 

	______________

	100 % TOTAL

Comments: 8.5 x 10-6 coefficient of thermal expansion (50-450 C)



57.Lead Monosilicate

Cost/lb: $1.92

M.P./F 1340.0

Equivalent Molecular Weight:  262.609



Molecular Formula of Lead Monosilicate:

	PbO   1.000		SiO2  0.656



     Percentage Analysis

	 15.00 % SiO2 

	 85.00 % PbO  

	______________

	100 % TOTAL

Comments: 9.3 x 10-6 coefficient of thermal expansion (50-450 C) 3 PbO2 SiO2

Potential Health Hazards:

TOXIC-avoid ingestion. DO NOT USE ON WARE INTENDED FOR FOOD.



58.Lead Sequisilicate

M.P./C 850

Equivalent Molecular Weight:  626.700



Molecular Formula of Lead Sequisilicate:

	PbO   1.000		SiO2  2.000



     Percentage Analysis

	 34.99 % SiO2 

	 65.01 % PbO  

	______________

	100 % TOTAL

Comments: 2 PbO3 SiO2

Potential Health Hazards:

TOXIC-avoid ingestion. DO NOT USE IN GLAZES FOR WARE INTENDED FOR FOOD.



59.Leadless Frit

M.P./F 1600

Silica/Alumina ratio: 9.4:1

Equivalent Molecular Weight:  279.314



Molecular Formula of Leadless Frit:

	K2O   0.002	Al2O3  0.274	SiO2  2.580

	Na2O  0.287	B2O3   0.553	

	CaO   0.711		



     Percentage Analysis

	 55.50 % SiO2 

	 10.02 % Al2O3

	  0.07 % K2O  

	  6.38 % Na2O 

	 14.28 % CaO  

	 13.76 % B2O3 

	______________

	100 % TOTAL



60.Pemco Frit P-238

M.P./F 1450.0

Silica/Alumina ratio: 4.3:1

Equivalent Molecular Weight:  670.728



Molecular Formula of Pemco Frit P-238:

	K2O   0.221	Al2O3  1.086	SiO2  4.635

	Na2O  0.779	B2O3   3.062	



     Percentage Analysis

	 41.50 % SiO2 

	 16.50 % Al2O3

	  3.10 % K2O  

	  7.20 % Na2O 

	 31.70 % B2O3 

	______________

	100 % TOTAL

Comments: 7.6 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 535 Melting Range F = 1450-1560



61.Pemco Frit P-25

Cost/lb: $.62

M.P./F 1400.0

Silica/Alumina ratio: 6.9:1

Equivalent Molecular Weight:  318.900



Molecular Formula of Pemco Frit P-25:

	K2O   0.184	Al2O3  0.381	SiO2  2.629

	Na2O  0.760	B2O3   0.774	

	CaO   0.029		

	ZnO   0.028		



     Percentage Analysis

	 49.55 % SiO2 

	 12.17 % Al2O3

	  5.43 % K2O  

	 14.78 % Na2O 

	  0.50 % CaO  

	  0.70 % ZnO  

	 16.86 % B2O3 

	______________

	100 % TOTAL

Comments: 10.0 x 10-6 coefficient of thermal expansion (50-450 C) m.p. 1320-1420 F



62.Pemco Frit P-283

Cost/lb: $1.62

M.P./F 1420

Silica/Alumina ratio: 22.0:1

Equivalent Molecular Weight:  344.200



Molecular Formula of Pemco Frit P-283:

	Na2O  0.922	Al2O3  0.199	SiO2  4.385

	CaO   0.018		

	MgO   0.060		



     Percentage Analysis

	 76.50 % SiO2 

	  5.90 % Al2O3

	 16.60 % Na2O 

	  0.70 % MgO  

	  0.30 % CaO  

	______________

	100 % TOTAL

Comments: 9.2 x 10-6 coefficient of thermal expansion (50-450 C)  melting range of 1420-1670 F 



63.Pemco Frit P-311

M.P./C 1500

Silica/Alumina ratio: 9.2:1

Equivalent Molecular Weight:  275.056



Molecular Formula of Pemco Frit P-311:

	K2O   0.020	Al2O3  0.270	SiO2  2.486

	Na2O  0.288	B2O3   0.570	

	CaO   0.691		



     Percentage Analysis

	 54.30 % SiO2 

	 10.00 % Al2O3

	  0.70 % K2O  

	  6.50 % Na2O 

	 14.10 % CaO  

	 14.40 % B2O3 

	______________

	100 % TOTAL

Comments: 7.0 x 10-6 coefficient of thermal expansion (50-450 C) IFP 669 C melting range 1500-1630F



64.Pemco Frit P-318

M.P./F 1650

Equivalent Molecular Weight:  366.022



Molecular Formula of Pemco Frit P-318:

	BaO   1.000	B2O3   1.049	SiO2  2.328



     Percentage Analysis

	 38.20 % SiO2 

	 41.90 % BaO  

	 19.90 % B2O3 

	______________

	100 % TOTAL

Comments: 7.0 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 650 Melting Range F = 1650-1800



65.Pemco Frit P-404

M.P./F 1430

Silica/Alumina ratio: 6.7:1

Equivalent Molecular Weight:  186.834



Molecular Formula of Pemco Frit P-404:

	K2O   0.238	Al2O3  0.198	SiO2  1.325

	Na2O  0.139		

	CaO   0.406		

	BaO   0.217		



     Percentage Analysis

	 42.60 % SiO2 

	 10.80 % Al2O3

	 12.00 % K2O  

	  4.60 % Na2O 

	 12.20 % CaO  

	 17.80 % BaO  

	______________

	100 % TOTAL

Comments: 13.0 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 1430-1960



66.Pemco Frit P-54

Cost/lb: $.57

M.P./F 1400

Equivalent Molecular Weight:  189.700



Molecular Formula of Pemco Frit P-54:

	Na2O  0.320	B2O3   0.635	SiO2  1.457

	CaO   0.680

		

Percentage Analysis

	 46.17 % SiO2 

	 10.46 % Na2O 

	 20.12 % CaO  

	 23.26 % B2O3 

	______________

	100 % TOTAL

Comments: 8.9 x 10-6 coefficient of thermal expansion (50-450 C) Melting range: 1400-1480 F



67.Pemco Frit P-586

M.P./F 1600

Silica/Alumina ratio: 10.2:1

Equivalent Molecular Weight:  188.802



Molecular Formula of Pemco Frit P-586:

	K2O   0.080	Al2O3  0.152	SiO2  1.550

	Na2O  0.049	B2O3   0.122	

	CaO   0.481		

	MgO   0.028		

	ZnO   0.311		

	BaO   0.050

		

     Percentage Analysis

	 49.30 % SiO2 

	  8.20 % Al2O3

	  4.00 % K2O  

	  1.60 % Na2O 

	  0.60 % MgO  

	 14.30 % CaO  

	  4.09 % BaO  

	 13.41 % ZnO  

	  4.50 % B2O3 

	______________

	100 % TOTAL

Comments: 7.5 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 689 Melting Range F = 1600-1860



68.Pemco Frit P-609

M.P./C 625.0

Silica/Alumina ratio: 12.5:1

Equivalent Molecular Weight:  255.679



Molecular Formula of Pemco Frit P-609:

	K2O   0.030	Al2O3  0.200	SiO2  2.500

	Na2O  0.090	B2O3   0.330	

	CaO   0.320		

	MgO   0.210		

	Li2O  0.140		

	SrO   0.210

		

Percentage Analysis

	 59.06 % SiO2 

	  8.02 % Al2O3

	  1.11 % K2O  

	  2.19 % Na2O 

	  3.33 % MgO  

	  7.06 % CaO  

	  8.56 % SrO  

	  1.65 % Li2O 

	  9.01 % B2O3 

	______________

	100 % TOTAL

Comments: 6.9 x 10-6 coefficient of thermal expansion (50-450 C)  Melting point 1430-1530F



69.Pemco Frit P-626

M.P./F 1500

Silica/Alumina ratio: 15.5:1

Equivalent Molecular Weight:  371.802



Molecular Formula of Pemco Frit P-626:

	Na2O  0.336	Al2O3  0.197	SiO2  3.044

	BaO   0.664	B2O3   0.664	



Percentage Analysis

	 49.19 % SiO2 

	  5.40 % Al2O3

	  5.60 % Na2O 

	 27.40 % BaO  

	 12.40 % B2O3 

	______________

	100 % TOTAL

Comments: 7.2 x 10-6 coefficient of thermal expansion (50-450 C) Melting range: 1460-1570 F Ferro frit 3289 is a direct substitute.



70..Pemco Frit P-64

M.P./F 1299.9

Silica/Alumina ratio: 68.0:1

Equivalent Molecular Weight:  206.958



Molecular Formula of Pemco Frit P-64:

	K2O   0.010	Al2O3  0.020	SiO2  1.360

	Na2O  0.160	B2O3   0.290	ZrO2  0.170

	CaO   0.330		F     0.220

	ZnO   0.390		

	BaO   0.110

		

Percentage Analysis

	 39.47 % SiO2 

	  0.99 % Al2O3

	  0.46 % K2O  

	  4.79 % Na2O 

	  8.94 % CaO  

	  8.15 % BaO  

	 15.34 % ZnO  

	  9.73 % B2O3 

	 10.12 % ZrO2  

	  2.02 % F     

	______________

	100 % TOTAL

Comments: 7.8 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 616 Melting Range F = 1300-1420



71.Pemco Frit P-67

M.P./F 1530

Silica/Alumina ratio: 5.9:1

Equivalent Molecular Weight:  310.163



Molecular Formula of Pemco Frit P-67:

	K2O   0.119	Al2O3  0.368	SiO2  2.169

	Na2O  0.190	B2O3   1.161	

	CaO   0.691		



     Percentage Analysis

	 42.00 % SiO2 

	 12.10 % Al2O3

	  3.60 % K2O  

	  3.80 % Na2O 

	 12.50 % CaO  

	 26.00 % B2O3 

	______________

	100 % TOTAL

Comments: 7.0 x 10-6 coefficient of thermal expansion (50-450 C) Melting range: 1530-1760 F



72.Pemco Frit P-688

M.P./F 1550

Silica/Alumina ratio: 11.9:1

Equivalent Molecular Weight:  160.785



Molecular Formula of Pemco Frit P-688:

	K2O   0.051	Al2O3  0.111	SiO2  1.312

	Na2O  0.041		

	CaO   0.453		

	MgO   0.171		

	ZnO   0.172		

	BaO   0.111		

     Percentage Analysis

	 49.00 % SiO2 

	  7.01 % Al2O3

	  2.99 % K2O  

	  1.60 % Na2O 

	  4.30 % MgO  

	 15.80 % CaO  

	 10.60 % BaO  

	  8.70 % ZnO  

	______________

	100 % TOTAL

Comments: 8.0 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 1550-2100



73.Pemco Frit P-786

M.P./F 1640

Silica/Alumina ratio: 14.8:1

Equivalent Molecular Weight:  283.119

Molecular Formula of Pemco Frit P-786:

	K2O   0.090	Al2O3  0.189	SiO2  2.791

	Na2O  0.091	B2O3   0.359	

	CaO   0.581		

	SrO   0.238		

     Percentage Analysis

	 59.20 % SiO2 

	  6.80 % Al2O3

	  2.99 % K2O  

	  2.00 % Na2O 

	 11.50 % CaO  

	  8.70 % SrO  

	  8.80 % B2O3 

	______________

	100 % TOTAL

Comments: 7.2 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 1640-1910



74.Pemco Frit P-802

M.P./F 1350

Silica/Alumina ratio: 8.8:1

Equivalent Molecular Weight:  275.452

Molecular Formula of Pemco Frit P-802:

	K2O   0.202	Al2O3  0.260	SiO2  2.291

	Na2O  0.360	B2O3   0.655	

	CaO   0.438		

     Percentage Analysis

	 49.94 % SiO2 

	  9.61 % Al2O3

	  6.91 % K2O  

	  8.11 % Na2O 

	  8.91 % CaO  

	 16.51 % B2O3 

	______________

	100 % TOTAL

Comments: 9.9 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 558 Melting Range F = 1350-1450



75.Pemco Frit P-827

M.P./F 2000

Silica/Alumina ratio: 11.1:1

Equivalent Molecular Weight:  181.426



Molecular Formula of Pemco Frit P-827:

	K2O   0.096	Al2O3  0.141	SiO2  1.556

	Na2O  0.041		

	CaO   0.427		

	MgO   0.050		

	ZnO   0.321		

	BaO   0.065		



     Percentage Analysis

	 51.50 % SiO2 

	  7.90 % Al2O3

	  5.00 % K2O  

	  1.40 % Na2O 

	  1.10 % MgO  

	 13.20 % CaO  

	  5.50 % BaO  

	 14.39 % ZnO  

	______________

	100 % TOTAL

Comments: 7.0 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 2000-2040



76.Pemco Frit P-830

M.P./F 1320

Equivalent Molecular Weight:  271.159



Molecular Formula of Pemco Frit P-830:

	Na2O  0.652	B2O3   0.843	SiO2  2.542

	CaO   0.348		



     Percentage Analysis

	 56.30 % SiO2 

	 14.90 % Na2O 

	  7.20 % CaO  

	 21.60 % B2O3 

	______________

	100 % TOTAL

Comments: 8.6 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 605 Melting Range F = 1320-1420



77.Pemco Frit P-878

M.P./F 1500

Equivalent Molecular Weight:  261.140



Molecular Formula of Pemco Frit P-878:

	Na2O  0.320	B2O3   0.639	SiO2  1.879

	CaO   0.680		ZrO2  0.373



     Percentage Analysis

	 43.21 % SiO2 

	  7.60 % Na2O 

	 14.60 % CaO  

	 17.00 % B2O3 

	 17.60 % ZrO2  

	______________

	100 % TOTAL

Comments: 7.9 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 650 Melting Range F = 1500-1590



78.Pemco Frit P-926

M.P./F 1650

Silica/Alumina ratio: 17.2:1

Equivalent Molecular Weight:  266.992



Molecular Formula of Pemco Frit P-926:

	K2O   0.241	Al2O3  0.131	SiO2  2.245

	Na2O  0.732	B2O3   0.719	

	Li2O  0.027		



     Percentage Analysis

	 50.50 % SiO2 

	  4.99 % Al2O3

	  8.50 % K2O  

	 17.00 % Na2O 

	  0.30 % Li2O 

	 18.70 % B2O3 

	______________

	100 % TOTAL

Comments: 8.4 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 640 Melting Range F = 1650-1700



79.Pemco Frit P-930

M.P./F 1500

Silica/Alumina ratio: 21.7:1

Equivalent Molecular Weight:  300.585



Molecular Formula of Pemco Frit P-930:

	Na2O  0.209	Al2O3  0.121	SiO2  2.617

	CaO   0.289	B2O3   0.667	ZrO2  0.029

	SrO   0.502		



     Percentage Analysis

	 52.30 % SiO2 

	  4.10 % Al2O3

	  4.30 % Na2O 

	  5.40 % CaO  

	 17.31 % SrO  

	 15.40 % B2O3 

	  1.20 % ZrO2  

	______________

	100 % TOTAL

Comments: 6.8 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C = 675 Melting Range F = 1500-1600



80.Pemco Frit P-941

M.P./F 2250

Silica/Alumina ratio: 5.3:1

Equivalent Molecular Weight:  218.303



Molecular Formula of Pemco Frit P-941:

	CaO   0.128	Al2O3  0.420	SiO2  2.217

	MgO   0.872		



     Percentage Analysis

	 61.00 % SiO2 

	 19.60 % Al2O3

	 16.10 % MgO  

	  3.30 % CaO  

	______________

	100 % TOTAL

Comments: 4.4 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 2250-2320



81.Pemco Frit Pb-349

M.P./F 1670.0

Silica/Alumina ratio: 14.7:1

Equivalent Molecular Weight:  312.850



Molecular Formula of Pemco Frit Pb-349:

	K2O   0.090	Al2O3  0.190	SiO2  2.802

	Na2O  0.091	B2O3   0.360	

	CaO   0.580		

	PbO   0.240		



     Percentage Analysis

	 53.80 % SiO2 

	  6.20 % Al2O3

	  2.70 % K2O  

	  1.80 % Na2O 

	 10.40 % CaO  

	 17.10 % PbO  

	  8.00 % B2O3 

	______________

	100 % TOTAL

Comments: 6.5 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 1590-1670

Potential Health Hazards:

Contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD.



82.Pemco Frit Pb-742

Cost/lb: $1.00

M.P./F 1400

Silica/Alumina ratio: 21.5:1

Equivalent Molecular Weight:  355.500

Molecular Formula of Pemco Frit Pb-742:

	Na2O  0.210	Al2O3  0.121	SiO2  2.589

	CaO   0.289	B2O3   0.670	

	PbO   0.501		



     Percentage Analysis

	 43.76 % SiO2 

	  3.46 % Al2O3

	  3.66 % Na2O 

	  4.57 % CaO  

	 31.47 % PbO  

	 13.09 % B2O3 

	______________

	100 % TOTAL

Comments: 6.5 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 1350-1450

Potential Health Hazards:

contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD.



83.Pemco Frit Pb-83

M.P./F 1050

Equivalent Molecular Weight:  271.487

Molecular Formula of Pemco Frit Pb-83:

	Na2O  0.280	B2O3   0.563	SiO2  0.904

	PbO   0.720		



     Percentage Analysis

	 20.00 % SiO2 

	  6.40 % Na2O 

	 59.20 % PbO  

	 14.40 % B2O3 

	______________

	100 % TOTAL

Comments: 10.4 x 10-6 coefficient of thermal expansion (50-450 C) I.F.P.  C =  Melting Range F = 1000-1050

Potential Health Hazards:

contains Lead-avoid ingestion. NOT FOR USE WITH WARE INTENDED FOR FOOD.



84.PFrit 2261 PotClays

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  343.688



Molecular Formula of PotClays Frit 2261:

	PbO   1.000	Al2O3  0.086	SiO2  1.860



     Percentage Analysis

	 32.50 % SiO2 

	  2.55 % Al2O3

	 64.95 % PbO  

	______________

	100 % TOTAL

Comments: lead bisilicate frit. From PotClays in England.



85.PotClays Frit 2262

Equivalent Molecular Weight:  326.206



Molecular Formula of PotClays Frit 2262:

	PbO   1.000		SiO2  1.549

			TiO2  0.125

     Percentage Analysis

	 28.51 % SiO2 

	 68.43 % PbO  

	  3.06 % TiO2 

	______________

	100 % TOTAL

Comments: lead sesquisilicate frit. From PotClays in England.



86.PotClays Frit 2263

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  233.533

Molecular Formula of PotClays Frit 2263:

	K2O   0.033	Al2O3  0.173	SiO2  1.880

	Na2O  0.330	B2O3   0.630	

	CaO   0.634		

	MgO   0.003		

     Percentage Analysis

	 48.35 % SiO2 

	  7.55 % Al2O3

	  1.33 % K2O  

	  8.76 % Na2O 

	  0.05 % MgO  

	 15.22 % CaO  

	 18.73 % B2O3 

	______________

	100 % TOTAL

Comments: Standard borate frit. From PotClays in England.



87.PotClays Frit 2268

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  206.705

Molecular Formula of PotClays Frit 2268:

	CaO   1.000	Al2O3  0.097	SiO2  0.609

		B2O3   1.500	



     Percentage Analysis

	 17.70 % SiO2 

	  4.78 % Al2O3

	 27.13 % CaO  

	 50.39 % B2O3 

	______________

	100 % TOTAL

Comments: Calcium borate frit. From PotClays in England.



88.PotClays Frit 2270

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  423.508



Molecular Formula of PotClays Frit 2270:

	Na2O  0.414	Al2O3  0.236	SiO2  3.850

	CaO   0.413	B2O3   0.827	ZrO2  0.426

	MgO   0.112		

	ZnO   0.061		



     Percentage Analysis

	 54.60 % SiO2 

	  5.68 % Al2O3

	  6.06 % Na2O 

	  1.07 % MgO  

	  5.47 % CaO  

	  1.17 % ZnO  

	 13.56 % B2O3 

	 12.39 % ZrO2  

	______________

	100 % TOTAL

Comments: White zircon borax frit. From PotClays in England.



89.PotClays Frit 2275

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  178.835



Molecular Formula of PotClays Frit 2275:

	K2O   0.330	Al2O3  0.100	SiO2  1.500

	Na2O  0.500	B2O3   0.100	

	CaO   0.170		



     Percentage Analysis

	 50.38 % SiO2 

	  5.70 % Al2O3

	 17.38 % K2O  

	 17.33 % Na2O 

	  5.33 % CaO  

	  3.88 % B2O3 

	______________

	100 % TOTAL

Comments: High alkaline frit. From PotClays in England.



90.PotClays Frit 2279

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  534.695



Molecular Formula of PotClays Frit 2279:

	CaO   0.350	Al2O3  0.430	SiO2  5.720

	MgO   0.272	B2O3   1.380	

	ZnO   0.187		

	Li2O  0.190		



     Percentage Analysis

	 64.25 % SiO2 

	  8.20 % Al2O3

	  2.05 % MgO  

	  3.67 % CaO  

	  1.06 % Li2O 

	  2.85 % ZnO  

	 17.92 % B2O3 

	______________

	100 % TOTAL

Comments: Low expansion frit. From PotClays in England.



91.PotteryCrafts Frit P2950

Silica/Alumina ratio: 6.1:1

Equivalent Molecular Weight:  343.688



Molecular Formula of PotteryCrafts Frit P2950:

	PbO   1.000	Al2O3  0.086	SiO2  1.860



     Percentage Analysis

	 32.50 % SiO2 

	  2.55 % Al2O3

	 64.95 % PbO  

	______________

	100 % TOTAL

Comments: Lead bisilicate frit. From PotteryCrafts in England.



92.PotteryCrafts Frit P2951

Equivalent Molecular Weight:  325.690

Molecular Formula of PotteryCrafts Frit P2951:

	PbO   1.000		SiO2  1.540

			TiO2  0.125

     Percentage Analysis

	 28.40 % SiO2 

	 68.53 % PbO  

	  3.07 % TiO2 

	______________

	100 % TOTAL

Comments: Lead sesquisilicate frit. From PotteryCrafts in England.



93.PotteryCrafts Frit P2954

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  206.705

Molecular Formula of PotteryCrafts Frit P2954:

	CaO   1.000	Al2O3  0.097	SiO2  0.609

		B2O3   1.500	



     Percentage Analysis

	 17.70 % SiO2 

	  4.78 % Al2O3

	 27.13 % CaO  

	 50.39 % B2O3 

	______________

	100 % TOTAL

Comments: Calcium borate frit. From PotteryCrafts in England.



94.PotteryCrafts Frit P2957

Silica/Alumina ratio: 6.1:1

Equivalent Molecular Weight:  454.455

Molecular Formula of PotteryCrafts Frit P2957:

	K2O   0.132	Al2O3  0.418	SiO2  4.703

	Na2O  0.264	B2O3   0.963	

	CaO   0.594		

	MgO   0.010		



     Percentage Analysis

	 62.15 % SiO2 

	  9.38 % Al2O3

	  2.74 % K2O  

	  3.60 % Na2O 

	  0.09 % MgO  

	  7.33 % CaO  

	 14.71 % B2O3 

	______________

	100 % TOTAL

Comments: borax frit. From PotteryCrafts in England.



95.PotteryCrafts Frit P2958

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  447.071



Molecular Formula of PotteryCrafts Frit P2958:

	K2O   0.057	Al2O3  0.523	SiO2  4.310

	Na2O  0.515	B2O3   1.060	

	CaO   0.428		



     Percentage Analysis

	 57.90 % SiO2 

	 11.93 % Al2O3

	  1.20 % K2O  

	  7.14 % Na2O 

	  5.37 % CaO  

	 16.46 % B2O3 

	______________

	100 % TOTAL

Comments: borax frit. From PotteryCrafts in England.



96.PotteryCrafts Frit P2959

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  456.087



Molecular Formula of PotteryCrafts Frit P2959:

	Na2O  0.400	Al2O3  0.300	SiO2  5.000

	CaO   0.300	B2O3   1.000	

	MgO   0.250		

	ZnO   0.050		



     Percentage Analysis

	 65.84 % SiO2 

	  6.71 % Al2O3

	  5.44 % Na2O 

	  2.21 % MgO  

	  3.69 % CaO  

	  0.89 % ZnO  

	 15.23 % B2O3 

	______________

	100 % TOTAL

Comments: High temperature borax frit. From PotteryCrafts in England.



97.PotteryCrafts Frit P2960

Silica/Alumina ratio: 6.1:1

Equivalent Molecular Weight:  390.745



Molecular Formula of PotteryCrafts Frit P2960:

	K2O   0.029	Al2O3  0.556	SiO2  3.403

	Na2O  0.202	B2O3   1.030	

	CaO   0.760		

	MgO   0.010		



     Percentage Analysis

	 52.30 % SiO2 

	 14.50 % Al2O3

	  0.70 % K2O  

	  3.20 % Na2O 

	  0.10 % MgO  

	 10.90 % CaO  

	 18.30 % B2O3 

	______________

	100 % TOTAL

Comments: From PotteryCrafts in England. 



98.PotteryCrafts Frit P2961

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  360.333



Molecular Formula of PotteryCrafts Frit P2961:

	Na2O  0.490	Al2O3  0.806	SiO2  2.599

	CaO   0.500	B2O3   0.911	

	MgO   0.010		



     Percentage Analysis

	 43.32 % SiO2 

	 22.80 % Al2O3

	  8.43 % Na2O 

	  0.11 % MgO  

	  7.78 % CaO  

	 17.56 % B2O3 

	______________

	100 % TOTAL

Comments: Standard alkaline frit. From PotteryCrafts in England.



99.PotteryCrafts Frit P2962

Silica/Alumina ratio: 8.2:1

Equivalent Molecular Weight:  194.191



Molecular Formula of PotteryCrafts Frit P2962:

	K2O   0.210	Al2O3  0.093	SiO2  1.660

	Na2O  0.580	B2O3   0.105	

	CaO   0.105		

	BaO   0.105		



     Percentage Analysis

	 51.34 % SiO2 

	  4.88 % Al2O3

	 10.19 % K2O  

	 18.51 % Na2O 

	  3.03 % CaO  

	  8.29 % BaO  

	  3.75 % B2O3 

	______________

	100 % TOTAL

Comments: High alkaline frit. From PotteryCrafts in England.



    116.Pottery Craft 2955

Mol Wt: 234.7

M.P. 920 - 1050 C

Molecular Formula: 

	K2O   0.214	Al2O3  1.205	SiO2  1.884

	Na2O 0.417	B2O3    0.425

	Cao    0.366

	MgO 0.002