A few drops of water on top of a tiny pile of bentonite powder.

Thursday 19th December 2013

Notice the water just sits there in a little lake. It does not soak in because the bentonite gels in contact with the water and that gel acts as a barrier. This water-barrier property of bentonite is a key to its use in many products but can be a problem in ceramics (because it slows down the drying speed of bodies and glazes that contain it).

Pages that reference this post in the Digitalfire Reference Library:

Bentonite, Montmorillonite, Bentonite

This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.