Red Lead

Alternate Names: Minium, Lead(II,IV) oxide

Oxide	Analysis	Formula
PbO	97.67%	1.00
LOI	2.33%	n/a
Oxide Weight		223.20
Formula Weight		228.52

Notes

A powerful low fire flux. Once popular for its ability to produce glazes of very good flow qualities without pinholes or other defects. It also has powerful and vibrant color responses to metallic oxides.

Related Information

Links

Hazards	Lead Toxicology
Hazards	Lead in Ceramic Glazes Lead glazes may or may not be hazardous. This topic is not as clear as you might think.
Typecodes	Generic Material 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.
Typecodes	Flux Source 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.
Oxides	PbO - Lead Oxide
Materials	Litharge
Materials	Lead Bisilicate Frit A standard frit of 1 molar part of PbO and 2 of SiO2. It is considered stable and non-leachable.

Data

Frit Softening Point	880C M
Density (Specific Gravity)	9.00

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