Whiting has traditionally been a source of CaO in raw glazes and glass (however whitings also typically contain some dolomite as a contaminant).
Gamblin Dry Pigment - Whiting Calcium Carbonate, 212 Grams
Calcium Carbonate (English Whiting)
Whiting for Window Restoration - SRS Hardware
Calcite - Art Spectrum
Calcium Carbonate
Whiting
PCD French Chalk, calcium carbonate, whiting-PCD
Stained Glass Lead Cementing KIT: Whiting, Pint of Cement putty, Glazing Brush & FID
Calcium Carbonate Powder at Best Price in Delhi, Delhi
Whiting Powder 1 lb. Bag - Franklin Art Glass
Whiting
Description Description (Whiting) Calcium flux for hi-temp glazes.
Calcium Carbonate 325 Mesh – Whiting