How much rutile can a glaze take before it becomes unstable?

Wednesday 3rd August 2011

The 80:20 base Alberta slip base becomes oatmeal when over saturated with rutile or titanium (left:6% rutile, 3% titanium; right:4% rutile, 2% titanium right). That oatmeal effect is actually the excess titanium crystallizing out of solution in the melt as the kiln cools. Although the visual effects can be interesting, the micro-crystalline surface is often susceptible to cutlery marking and leaching. This is because the crystals are not as stable or durable as the glass of the glaze.

Pages that reference this post in the Digitalfire Reference Database:

Ceramic Rutile, GA6-F - Alberta Slip Cone 6 Oatmeal, Leaching, Crystallization, Food Safe, Rutile Glaze

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