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Pemco Frit Pb-742

Alternate Names: Frit Pb742

Description: Leaded zincless frit cone 08-1.

Oxide Analysis Formula
CaO 4.50% 0.29
Na2O 3.60% 0.21
PbO 31.00% 0.50
ZrO2 1.00% 0.03
B2O3 13.00% 0.67
Al2O3 3.40% 0.12
SiO2 43.50% 2.61
Oxide Weight 360.79
Formula Weight 360.79


Blend with Pb-349 for intermediate temperatures. Pb-63 has slightly more zirconia.

Similar to alternatives but has small amount of ZrO2 smelted in.

Related Information


Materials General Frit GF-27
Materials Fusion Frit FL-28
Materials Pemco Frit Pb-63
Materials Frit
Frits are made by melting mixes of raw materials, quenching the melt in water, grinding the pebbles into a powder. Frits have chemistries raw materials cannot.
Materials Ferro Frit 3485
Materials Ferro Frit 3493
Materials Ferro Frit 3576
Typecodes Leaded Frit
Frits can contain 1% or 80% PbO so this category can be misleading, check the chemistry to find out.
Typecodes Frit
A frit is the powdered form a man-made glass. Frits are premelted, then ground to a glass. They have tightly controlled chemistries, they are available for glazes of all types.


Co-efficient of Linear Expansion 6.5 x 10-6 (40-450C)
Frit Melting Range (C) 1350-1450F
I.F.P. (celsius) 585C
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