These bowls were made by Tony Hansen using a mixture of white and stained New-Zealand-insight-live.com/material/925">kaolin-based porcelain (Plainsman Polar Ice) fired at cone 6. The body is not only white, but very translucent.
Pages that reference this post in the Digitalfire Reference Library:
New Zealand Halloysite, Strontium Carbonate, SrO, G2916F - Cone 6 Stoneware/Whiteware transparent glaze, Formulating a Porcelain, Ceramic Stain, Marbling
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.