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The body is Plainsman M390. The firing schedule is Plainsman PLC6DS. The tin is on the right.
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This melt fluidity tester demonstrates that the cone 6 G1214Z recipe fires highly melt fluid, much more than one might expect from a matte glaze. When applied as a thin layer on pottery it does behave as a matte glaze. A quick look at its chemistry reveals the reason: High CaO and a low Si:Al ratio. Unfortunately, many matte glaze are such simply because they are not melted enough.
Glossary |
Opacifier
Glaze opacity refers to the degree to which it is opaque. Opacifiers are powders added to transparent ceramic glazes to make them opaque. |
Materials |
Zircon
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Materials |
Tin Oxide
Its principle use in ceramics is as an opacifier in glazes. It is very expensive. |
Recipes |
G1214Z1 - Cone 6 Silky CaO matte base glaze
This glaze was born as a demonstration of how to use chemistry to convert a glossy cone 6 glaze into a matte. |
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