This is a standard frit formula of 1 molar part of PbO and .66 of SiO2. The powder is light yellow. Some people consider a lead monosilicate to be 1PbO - 1SiO2. Frits of both chemistries are available and they both claim to be lead monosilicate.
|Materials||Ferro Frit 3327|
|Materials||Ferro Frit 3377|
|Materials||Solargil Frit FR1|
|Materials||Frit A 1316|
|Materials||Ceradel Frit C 1251|
|Materials||Lead Bisilicate Frit|
Materials that source Na2O, K2O, Li2O, CaO, MgO and other fluxes but are not feldspars or frits. Remember that materials can be flux sources but also perform many other roles. For example, talc is a flux in high temperature glazes, but a matting agent in low temperatures ones. It can also be a flux, a filler and an expansion increaser in bodies.
Generic materials are those with no brand name. Normally they are theoretical, the chemistry portrays what a specimen would be if it had no contamination. Generic materials are helpful in educational situations where students need to study material theory (later they graduate to dealing with real world materials). They are also helpful where the chemistry of an actual material is not known. Often the accuracy of calculations is sufficient using generic materials.
|Hazards||Lead in Frits: The Hazards|
|Co-efficient of Linear Expansion||9.3 x 10-6 (50-450C)|
|Density (Specific Gravity)||6.6-6.8|
|Frit Melting Range (C)||700-784C|