A glaze incompatible with chrome-tin stains (but great with inclusion stains)

Tuesday 1st April 2014

Left: A cone 6 insight-live.com/glossary/130">matte glaze (G2934 with no colorant). Middle: 5% Mason 6006 chrome-tin red stain added. Right: 5% Mason 6021 encapsulated red stain added. Why is there absolutely no color in the center glaze? This host recipe does not have the needed chemistry to develop the #6006 chrome-tin color (Mason specifies 10% minimum CaO, this almost has enough at 9.8%, but it also has 5% MgO and that is killing the color). Yet this same glaze produces a good red with #6021 encapsulated stain at only 5% (using 20% or more encapsulated stain is not unusual - so achieving this color with only 5% is amazing).

Pages that reference this post in the Digitalfire Reference Library:

Mason 6021 Red Stain, CaO, G2934 - Matte Glaze Base for Cone 6, Formulating a Clear Glaze Compatible with Chrome-Tin Stains, Stain 6006, Encapsulated 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.