Why is that high fire porcelain on the left so much more translucent?

Friday 29th May 2015

These two cone 10 porcelains have the same recipe. 50% Grolleg Kaolin and 25% each of silica and feldspar. But the one on the left is plasticized using 3.5% VeeGum T and the one on the right uses 5% regular raw bentonite. The VeeGum is obviously doing more than making it more workable, it is fluxing the body to make it much more translucent. Although not clear from this picture, the entire mug on the left is covered with blisters, it has over vitrified (while the one on the right is stable).

Pages that reference this post in the Digitalfire Reference Database:

Veegum, Grolleg Kaolin, VeeGum is a very strong flux in a cone 10 porcelain

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