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How to Prevent Bloating in Your Clay Body

Posted On January 9, 2015 1 Comment

With the holidays recently celebrated, we all may have become more familiar than we would like with a different kind of bloating, but today, let’s focus on bloating in clay bodies. Bloating is defined as a firing defect in which blisters form within a clay body, causing large lumps on the surface.

 

In today’s post, an excerpt from our free download Successful Tips for Buying and Using Pottery Clay: How to Select the Right Clay, Estimate your Clay Needs, and Test Clays for Better Results, Dave Finkelnburg explains the causes of bloating and shares how you can prevent this unsightly defect in your work.–Jennifer Harnetty, editor.

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A Case of the Blues: All You Ever Wanted to Know About Cobalt But Were Afraid to Ask

Posted On September 15, 2014 41 Comments

In today’s post, an excerpt from the “Technofile” department in Ceramics Monthly, Dave Finkelnburg discusses the many possibilities that are possible with the multifaceted little colorant we call cobalt. Plus he shares some sweet cobalt glaze recipes.

Selenium/Cadmium Red

Techno File: Four Ways to Reliable Red Ceramic Glazes

Posted On June 13, 2011 10 Comments

In today’s post, an excerpt from our latest free download, the 2011 Clay Workshop Handbook: Knowledge and Techniques for the Pottery Studio, Dave Finkelnberg explains four ways to get great red glazes and shares four fabulous red glaze recipes, from low-fire to high fire reduction. Have a look and then download your free copy of the 2011 Clay Workshop Handbook! Even if you are not going to a workshop this summer, there’s something in the handbook for you!

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How Glazes Melt: In Search of the Elusive Eutectic

Posted On December 9, 2009 2 Comments

Phases are specific forms of materials. The most familiar phases are solid, liquid and vapor. Any phase of a material is identical in composition and structure in all parts of that phase. For instance, a glass of water is the liquid phase of H2O, top to bottom; if it weren’t, we’d call it something else, like ice if it were solid (structural change), or lemonade if it had lemon and sugar dissolved in it (compositional change).