| Monthly Tech-Tip | No tracking! No ads! |
URL: Replace Talc with Nepheline Syenite in low temperature white bodies
Click the link below to go to this page
https://insight-live.com/insight/share.php?z=P8uThTnFoY
This is a development project at Plainsman Clays. It is in response to Texas talc no longer being available in North America.
Related Information
This cone 04 white body contains no talc. And there is no crazing!
This picture has its own page with more detail, click here to see it.
Talc bodies have been universal for decades. Talc has been an essential ingredient to raise the coefficient of thermal expansion (COE) of bodies to fit commercial glazes. Through time, the glaze and body manufacturers have zeroed in on a "COE target" that they can comfortably meet. In view on the situation with talc supply and litigation climate around its use, body makers are seeking a way to avoid it. Talc is a magnesium silicate and its COE reduction mechanism is thought to be as a catalyst to the growth of cristobalite during kiln cooling. The action of dolomite, one of the most common, inert and inexpensive of all minerals, appears to do the same. And in much lower percentages. This mug is made from a recipe that replaces the 50% talc with 15% dolomite and 35% nepheline syenite (the remainder being white ball clay). This body looks very promising, being better in almost every aspect.
Links
| Materials |
Natural Talc C-98
|
| Materials |
Amtalc-C98
|
| Materials |
Pioneer 2661 Talc
|
| Hazards |
Talc Hazards Overview
Talc is invaluable in the ceramics industry, it is used as a glaze and body ingredient and as a parting a release agent in various processes. Is it safe? |
Got a Question?
Buy me a coffee and we can talk 
https://digitalfire.com, All Rights Reserved
Privacy Policy