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Example of fritted white engobe over-fired to cone 2. During firing it has shrunk and the bond with the body has been completely compromised. The body has a firing shrinkage of about 6% but the slip is closer to 10%. Because glazes melt they do not have a firing shrinkage. But engobes do and it must be compatible with the body.
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Creating a Non-Glaze Ceramic Slip or Engobe
It can be difficult to find an engobe that is drying and firing compatible with your body. It is better to understand, formulate and tune your own slip to your own body, glaze and process. |
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