As of October 2022, Buff Plus now uses only 40mesh fireclay and 35 mesh grog.
A medium-range light stoneware body with about 9% fine grog which fires off-white to buff in oxidation and slightly darker in reduction.
![](https://cdn11.bigcommerce.com/s-63lfpiz22l/product_images/uploaded_images/moved-f263da3f00e53260d65fd0ca9f34ce8f.png)
![kansasclay.png kansasclay.png](https://cdn11.bigcommerce.com/s-63lfpiz22l/product_images/uploaded_images/kansasclay.png)
Flint Hills clays have been evaluated by a nationally certified toxicologist, and have been found to be in compliance with ASTM C-1023 and D-4236, and to not contain any material in sufficient quantity to be toxic or to constitute a chronic health hazard when used responsibly.