What Is Lead Bisilicate?

Lead Bisilicate fritting involves the melting together of glaze materials (some of which are soluble in water or stomach acids) to produce a combination which is insoluble (or relatively so). Lead bisilicate is the frit generally used in low solubility glazes and standard borax frit for leadless glazes.

Is lead Bisilicate safe?

Lead is found in pottery glazes as lead bisilicate in frits. These glazes are mainly used on earthen and raku ware. If they are not properly formulated, applied and fired, it is possible that they could leach into food or drink. ... Lead borosilicate frits have a higher lead-release figure and should be avoided.

What is a lead frit?

Lead bisilicate frit refers to frits having approximately one molar part of lead and two of silica. This ratio of silica and lead produces a stable low solubility powdered glass material that can be used in production with relative safety to workers.