Sponging and fired specks

Tuesday 23rd June 2015

The left half of this cone 6 buff burning native-clay stoneware (Plainsman M340) was sponged at the dry stage. That exposed iron-bearing particles that are normally pushed under the surface. The result is a denser population of fired specks. While not usually a problem on flat surfaces, this can be an issue when rims of insight-live.com/glossary/210">functional pieces are sponged and glazes stretch thin there during firing.

Pages that reference this post in the Digitalfire Reference Library:

Sponging and glaze defects, Specking on Ceramic Ware

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.