Oxides | Minerals | Materials | Recipes | Articles | Glossary | Hazards | Videos | Properties | Schedules | Temperatures | Tests | Troubles
•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
| If this formula is not unified correctly please contact us. | ||||||||||||||||||||||||||||||||||||||||
According to the data sheet it fires red progressing to brown by 2200F and purple/brown by 2400F.
The data sheet from Christy Minerals is unclear since it lists separate drying shrinkages for each of four temperatures (1800, 2000, 2200, 2400F) and they vary from 4.5 to 8.5% (this is not firing related, only one number should be stated).
Also, the LOI shown on the chart averages about 7% but in the analysis is 11%.
This material has an uncharacteristic fired shrinkage reduction with increasing temperature (12% at cone 08 going down to 3% by cone 9). This is happening because the material is beginning to expand already by 1900F and starting to bloat by 2200F.
Particle size (this is a 35 mesh material)
Retained: US 40: 22%
Retained: US 70 26.7%
Retained: US 200 28.5%
Out Bound Links
By Tony Hansen
