Creates opacity and matteness in low fire glazes for unique visual effects
Induces crawling and cracking in glaze layer for distinctive surface patterns
High melt viscosity pulls glaze into islands for dramatic color contrast
Common additive for producing dramatic visual effects in ceramics
Summarized by Shop
Magnesium Carbonate is used in low fire glazes to produce opacity and matteness. Magnesium carbonate is commonly added to glazes, especially at low fire, to make them crawl (it shrinks and cracks the glaze layer at the low end of firing and then its high melt viscosity pulls the glaze melt into islands). This often produces dramatic visua
