Description: English white salt-glazed stoneware oval dish with an oval wavy rim molded with a feather-edged border and the sides pierced with elaborate openwork patterns. Although Staffordshire white stoneware had been perfected by about 1720, its possibilities for mass-production were not fully exploited until the 1740s. Then the techniques of press-moulding, slip-casting and enamelling were developed, and the drabness of the greyish stoneware surface was successfully relieved by the addition of all-over decoration. The glaze on the stoneware was the result of throwing salt into a high temperature oven (1000-1100 degrees), where the heat caused the salt to volatilise and the soda in the salt to combine with the alumina and silica in the clay to form a thin vitreous glass-coating over the surface. That outer layer has characteristic minute pitting. Since there are no factory markings, it is very difficult to link pot with potter.
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