The foot ring on the left is plucking, the right one is not. Why?


Sunday 14th June 2015

These are insight-live.com/glossary/233">translucent porcelains, they are vitreous. The firing is to cone 10. The one on the left is a cone 6 body, and, while it survives to cone 10 it does warp. But more important, it is much more vitreous (more melted). The plucking problem makes it quite difficult to get a good foot ring. The other, which has only slight plucking, is also quite vitreous (high in feldspar). The plucking problem on both can be solved by simply using a better kiln wash. What is better? More refractory, and therefore having a powdery, non-stick surface. Spend more money on your kiln wash, base it on calcined alumina or zircon.

Pages that reference this post in the Digitalfire Reference Library:

Plucking on a vitreous porcelain at cone 6, Kiln Wash, Vitrification, Plucking


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