A Blog about Ceramic Art and Science

Ceramic Glazes

How to Convert Kaolin to Calcined Kaolin

How to Convert Kaolin to Calcined Kaolin

If you have too much clay in a glaze recipe, you might have issues with your glaze crawling during the firing. Crawling is where the glaze pulls away from the clay body due to a combination of shrinkage, poor adhesion and high surface tension.

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Understanding Cone 6 – NCECA presentation 2018

Understanding Cone 6 – NCECA presentation 2018

On Mar 15, 2018 I gave my first ever NCECA talk. I was part of a panel discussion called Glazes Without Borders, moderated by Matt Katz. My co-presenters Kiara Matos and Peter Berg gave talks about "Copper as a Flux" and "Copper Leaching and Glaze Durability". You can...

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How to Normalize a Glaze Recipe

How to Normalize a Glaze Recipe

When a recipe adds up to 100%, we can easily compare it to other recipes.  This is particularly useful when we have additions like colourants and opacifiers.  The base recipe remains constant while the additions are always relative to 100%. It also allows us to look at 2 recipes side by side and compare the amounts of individual materials. But what do we do if our recipe doesn’t add up to 100%?

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