Monthly Tech-Tip | No tracking! No ads! |
Commercial underglaze colors fired in a flow tester. Underglazes need to melt enough to bond with the underlying body, but not so much that edges of designs bleed excessively into the overlying glaze. A regular glaze would melt enough to run well down the runway on this tester, but an underglaze should not flow at all. The green one here is clearly not sufficiently developed, its base needs more frit. The black is much too melted, its base needs less frit. The pink and blue are also melting too much. Clearly, underglazes recipes need individual attention so they melt to the same degree.
Glossary |
Underglaze
An intensely pigmented highly opaque non-melting ceramic material mix meant to adhere best to leather hard pottery and fire-fit the body. Often transparently overglazed. Starter recipes. |
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Glossary |
Silk screen printing
Silk screen printing is one of the best options for hobbyists and potters to reproduce crisp and detailed decoration. But there are many details to know. |
Troubles |
Bleeding colors
In ceramics, the edges of overglaze and underglaze color decoration often bleeds into the over or under glaze. How can this be avoided. |
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