|Monthly Tech-Tip |
No longer available.
Was for use in all ceramic applications where a fine-ground talc will develop higher fired strength than coarser grades. Used as an auxiliary flux in electrical porcelain, hotel china and sanitaryware bodies to lower manufacturing temperatures without narrowing the firing range. In semivitreous dinnerware, it decreases the moisture expansion and increases the thermal expansin, contributing to improved resistnace to crazing in glazes dinnerware.
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.
Talc Hazards Overview
Talc is invaluable in the ceramics industry, it is used as a glaze and body ingredient and as a parting a release agent in various processes. Is it safe?