•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

Sign-up at https://insight-live.com today.

Cresta BB

Alternate Names: Gulgong clay

Oxide Weight364.21
Formula Weight398.48
If this formula is not unified correctly please contact us.

The mine at Gulgong, NSW, Australia, produced a white, plastic raw clay that was used by many people (and manufacturers) to make clay bodies of many types (especially stoneware). It was prized as the best combination of whiteness and plasticity available in the country. It has a very low iron content and very low concentration of fluxes.

In 2015 it was determined to be uneconomic by the manufacturer so not more stockpiles have been made. In addition the last of the stockpiled Gulgong clay appears to be slightly different (less white and plastic). As a result companies had to reformulate their bodies, often the replacement being of lower quality.

Gulgong Clay from NSW, Australia

Gulgong Clay from NSW, Australia

Prized for its whiteness and plasticity. A base for many stonewares.

By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Cresta BB" descrip="" searchkey="Gulgong clay" loi="0.00" casnumber=""> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.100" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.500" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.200" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.300" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="1.000" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="U" percent="25.600" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="63.100" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="0.610" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="8.600" tolerance=""/> </volatiles> </material>

Feedback, Suggestions

Your email address


Your Name


Copyright 2003, 2008, 2015 https://digitalfire.com, All Rights Reserved