Mason 6315 Zirconium Vanadium Stain Ribs & Scrapers That means that it's presence

That means that it's presence enables reducing feldspar content which in turn provides even more opportunity to source Al2O3 from kaolin or clay

Alumina oxide is a chemical compound of aluminium and oxygen

Not quite as smooth as M340 and sacrifices a little drying strength to get the added texture

Learn More about L210 Here

It is often used in a glaze to affect acid resistance

Mason 6315 Zirconium Vanadium Stain Ribs & Scrapers That means that it's presenceStains are a mixture of ceramic oxides and coloring metal oxides that are melted in kilns, quenched, ground to specific mesh size (some are acid washed), and colored with organic dyes to simulate the fired color. Essentially they are fritted colorants. They are made and manufactured for several reasons: to provide a consistent and stable form of colorant that doesnt dissolve in the glaze melt as easily as coloring metal oxides; to make colorants safer