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200 mesh | 325 mesh | 3D Design | 3D Printer | 3D Printing Clay | 3D Slicer | 3D-Printing | Abrasion Ceramics | Acidic Oxides | Agglomeration | AI in Ceramics | Alkali | Alkaline Earths | Amorphous | Apparent porosity | Artware | Ball milling | Bamboo Glaze | Base Glaze | Base-Coat Dipping Glaze | Basic Oxides | Batch Recipe | Bisque | Bit Image | Black Core | Bleeding of colors | Blender Mixing | Blunging | Body Bloating | Body glaze Interface | Body Warping | Bone China | Borate | Boron Blue | Boron Frit | Borosilicate | Breaking Glaze | Brick Making | Brushing Glaze | Calcination | Calculated Thermal Expansion | Candling | Carbon Burnout | Carbon trap glazes | CAS Numbers | Casting-Jiggering | Catch Glaze | Celadon Glaze | Ceramic | Ceramic Binder | Ceramic Decals | Ceramic Glaze | Ceramic Glaze Defects | Ceramic Ink | Ceramic Material | Ceramic Oxide | Ceramic Slip | Ceramic Stain | Ceramic Tile | Ceramics | Characterization | Chemical Analysis | Chromaticity | Clay | Clay body | 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Jasper Ware

A porcelain manufacturing technique developed by English potter Josiah Wedgwood in 1775. His ware was typically a blue stained unglazed porcelain with intricately overlaid relief designs on a white unglazed porcelain. The term "Jasper" derives from its similarity to the stone. The manner in which these designs were carved in large size and then reduced by repeated negative impressions of a high shrinkage clay is a matter of amazement for those who have studied the technique. The amount of stain needed in the body differs by color. When raw oxide colorants are employed (e.g. cobalt for blue) the porcelain formulation must be adjusted to compensate for the effect on degree of vitrification, they must also be thoroughly milled to eliminate fired specks. Modern applications of this technique use stains to get much better consistency and color. The ware is burnished after production.

Related Information

Links

URLs http://www.thepotteries.org/types/jasper.htm
About Jasper Ware
Glossary Ceramic Stain
Ceramic stains are manufactured powders. They are used as an alternative to employing metal oxide powders and have many advantages.
By Tony Hansen
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