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