Dictionary
Antiques and Collectibles Terms - S
Definitions: Semi-Porcelain, Spur Marks, Staffordshire Knot, Stoneware
Semi-Porcelain
| Earthenware ceramics. Semi-porcelain objects are opaque and non-vitreous. |
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Spur Marks
| Small rough spots made by the clay supports which hold and separate ceramic plates and platters in the kiln during the firing process. |
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Staffordshire Knot
| A printed mark in the form of a bow used by many Staffordshire potters during the nineteenth century. |
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Stoneware
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Pottery with a porosity of less than 5%. It is glazed and fired only once, at extremely high temperatures, until it is vitrified. Stoneware is made from natural clays of a sedimentary type, fine grained and plastic. It is opaque, heavy, and quite durable.
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