Wednesday, December 26, 2012

How important is clay for a glaze?

I recently made tests of clay for Pro-Pec Company. All tests in this presentation are made from EIGHT different clays and fired in electric kiln to 1227°C with our hold at the end and controlled cooling. They are all glazed by ONE glaze, one dip. All were place on same shelf in the kiln.

I leave the answer of the question in title on you…


  1. Not that I'm an expert or doing ceramics myself, but I didn't know that glazes can differ so much. Thanks for sharing!

    1. Interestingly clay is only one aspect, which makes glazes to change - thickness (in which glaze is applied), speed (in which kiln cools down), firing schedule and in great amount atmosphere in kiln (in different periods of firing) also attributes to glazes changes. And I could start talking about how much materials, from which the glazes are made, around the globe differ... It is so much fun exploring the possibilities...