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The buff stoneware mug is fired at cone 10R and celadon glazed. The recesses were colored with a tenmoku glaze (on bisque by painting it into the recesses and sponging away the high spots). An outer containment line on the plate prevented the outside line from smearing outward and it provided a definite profile for cut-out after stamping.
We find the 0.047 relief depth shown here is best (K152). Shallower ones will stamp a crisper design but K152 is better if pigment will be used to highlight the recesses. For some things it can be valuable to put border around the outside of a design so that when the stamp is pressed hard into the clay, the edges do not smear outward. These do not actually need to be stuck to a piece of wood, just lay them face down on the clay and use a wooden block to press them. Because they are flexible it is easy to peel them out. When the clay is stiff enough no parting agent is needed. The cost: In 2022 the minimum charge is $35 for about 50 square inches. They accept PDF and bit image files and the shopping cart enables previewing. The cart might generate CMYK plates (four of them for process color printing), just remove the CMY ones and keep the K (black). The most common mistake is having too much detail or too small printing. Or forgetting to make them reverse-reading. It is best to make your images using vector graphic software like Illustrator or Inkscape.
Glossary |
Celadon Glaze
A type of stoneware glaze normally fired in a high temperature reduction atmosphere kiln. It is transparent and stained green or blue by the presence of iron oxide. |
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Recipes |
G1947U - Cone 10 Glossy transparent glaze
Reliable widely used glaze for cone 10 porcelains and whitewares. The original recipe was developed from a glaze used for porcelain insulators. |
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