When using stains, customize the percentage, host glaze and firing schedule


Saturday 2nd June 2018

These are G2926B clear glazes with insight-live.com/glossary/182">stains added and fired at cone 6. The one on the left has 11% Mason 6021 encapsulated red. It is pebbling the surface (even with 2% zircon), it may be at the upper end of its firing range. Possible solutions are faster firing up and down to give the stain less chance to decompose. Or firing at cone 5 instead. Or a drop-and-hold firing schedule. Or a lower percentage, that could impart a bit of variation where it is thicker and thinner (like the purple one). A different host glaze, perhaps one with less boron. The purple one has 10% Mason 6304, it is not affecting the glossy glaze surface. But the percentage needs to be higher to prevent the wash-out of color where it is applied thinner.

Pages that reference this post in the Digitalfire Reference Library:

Mason 6304 Violet Chrome Tin, Mason 6021 Red Stain, Mason stains in the G2926B base glaze at cone 6, Encapsulated Stain, Ceramic Stain


This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.