•The secret to cool bodies and glazes is a lot of testing.
•The secret to know what to test is material and chemistry knowledge.
•The secret to learning from testing is documentation.
•The place to test, do the chemistry and document is an account at https://insight-live.com
•The place to get the knowledge is https://digitalfire.com
Christy Minerals Grog
Calcined flint grog
Alternate Names: MCF Grog
Many sizes are available.
The MCF designation refers to Missouri Calcined Fireclay. The company sells the raw fireclay and many calcined products made from it.
Various grogs available in North America
Examples of various sized grogs from CE Minerals, Christy Minerals, Plainsman Clays. Grogs are added to clays, especially those used for sculpture, hand building and industrial products like brick and pipe (to improve drying properties). The grog reduces the drying shrinkage and individual particles terminate micro-cracks as they develop (larger grogs are more effective at the latter, smaller at the former). Grogs having a narrower range of particle sizes (vs. ones with a wide range of sizes) are often the most effective additions. Grogs having a thermal expansion close to that of the fired body, a low porosity, lighter color and minimal iron contamination are the most sought after (and the most expensive).
Out Bound Links
- (Suppliers - Manufacturer)
[histaddcheckbox] Christy Minerals LLC
- (Typecodes - Type)
1: AGT - Aggregate
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Christy Minerals Grog" descrip="Calcined flint grog" searchkey="MCF Grog" loi="0.00" casnumber="">
Copyright 2003, 2008, 2015 https://digitalfire.com, All Rights Reserved