|Monthly Tech-Tip |
A selectively mined stoneware clay this is exceptionally cean and when ordered in 200 mesh offers the potter a stoneware fireclay which works well by itself or in compound bodies. The fired color is warn buff and it has a firing range of cone 1 to 8. This material will respond to deflocculnts and can thus be used in slip casting bodies.
This has been used for over 100 years by Roseville and Zanesville, OH potters. Some add small amounts of grog to impart texture and improve drying.
The most common commercially 200 mesh available raw terra cotta clay in North America. It fires red, has low plasticity and matures a low kiln temperatures.
Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.
|Pyrometric Cone Equivalent||23|
|By Tony Hansen|
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