Essaily Posted November 16, 2012 Report Share Posted November 16, 2012 I would like to mix a porcelain clay body with a stoneware clay body. Has anybody tried this before? What happens after a bisque fire? Which temperature do you follow for the bisque & glaze fire - the porcelain body or the stoneware? When it comes to glazing, can I use an earthenware premixed glaze on this mixed body? Will it be food safe if I leave it unglazed? Thanks for any advice most welcome! I haven't a clue. Link to comment Share on other sites More sharing options...
bciskepottery Posted November 16, 2012 Report Share Posted November 16, 2012 Many clay manufacturers sell a blend of porcelain/stoneware, often a 50/50 mix. Look for compatibility in shrinkage; do some small test batches and bisque and glaze fire to see how they perform before going an committing yourself to large amounts. I would mix cone 6 porcelain with cone 6 stoneware, cone 10 porcelain with cone 10 stoneware. Foods safe for unglazed will depend on firing to maturity and surface and what is in the clay bodies . . . something that is rough and pitted, or carved, will offer hiding places for bacteria to grow and fester. You can always put a napkin or other item between food and surface. Restrict yourself to non-liquids, etc. Foods may stain the surface. Link to comment Share on other sites More sharing options...
clay lover Posted November 16, 2012 Report Share Posted November 16, 2012 I often mix a % of porcelain, ^6, in with my ^6 stoneware clay to get better throwability, or lighten the color, or reduce the speckles of the stoneware. Sometimes I leave it only semi-mixed, and have swirles in the light-dark clay that make a good look on the finished piece. Link to comment Share on other sites More sharing options...
Essaily Posted November 17, 2012 Author Report Share Posted November 17, 2012 Thanks all for your informative posts! I looked at the packaging and noticed it is already mixed with stoneware. Let's see what happens. Link to comment Share on other sites More sharing options...
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