Scarva Raw Materials Cornish Stone RM1021 From £6.70

An alternative, but not a substitute to feldspar as a high temperature flux, giving greater fired strength. This stone has a low iron content, so improving whiteness, and a high silica content and so promoting a greater transparency. It is therefore particularly appropriate for use in china, porcelain and other white bodies.

Formula: 3.8% K2O, 4% Na2O, 15% AI2O3, 72.9% SiO2