•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.

Water Smoking

Refers to the period in firing where the last of the mechanical water in body and glaze are being released. Firing can normally proceed quickly after this water has been ejected (up to 750C/hour is common in industry). Typically firings are taken to the boiling point (or slightly beyond) and held there for the amount of time necessary to remove all the water (the "water smoking soak"). The degree to which the drying process has removed water determines not only the soak time needed at boiling point, but also the temperature at which the water smoking soak can be conducted.

Contrary to what you might assume, for well dried ware this smoking is more effectively conducted beginning at 140C and proceeding gradually to 260C. However, for a typical studio potter, care and testing are needed, since ware is normally only air-dried when it goes into the firing and bodies are more plastic and fine grained.

Put almost-dry ware into a kiln. This happens!

Put almost-dry ware into a kiln. This happens!

An example of what can happen if ware is heated too fast during early stages of firing. This bowl was not quite dry on the base, it is Plainsman M370. Even though the firing proceeded to 220 degrees and soaked for an hour, it was not enough time for the water to escape before the second step in the firing schedule.

Out Bound Links

  • (Glossary) Firing Schedule

    In most electric periodic kilns firing schedules a...

  • (Glossary) Firing

    At it most basic level, firing is process of heati...

  • (Glossary) Decomposition

    Decomposition is the breaking of inter-molecule bo...

In Bound Links

By Tony Hansen

Feedback, Suggestions

Your email address


Your Name


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