Plucking on a vitreous porcelain at cone 6

Monday 6th July 2015

The mug on the left is made from a whiteware body (Plainsman M370), the one on the right is a highly vitreous insight-live.com/glossary/233">translucent one (Plainsman Polar Ice). Both have been over-fired slightly. The Polar Ice mug has stuck to the shelf somewhat, taking chips out of the base on the outer perimeter of the bare porcelain (a fault called Plucking). If the shelf had been better dusted with alumina powder (or a kiln wash based on it) rather than a cheap kiln wash made from a kaolin:silica mix there would have been no problem.

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

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.