pearlware

An improved version of creamware introduced by Wedgwood in 1779.

the body included a greater percentage of flint and white clay, and the glaze contained a trace of cobalt oxide, which gave the body a bluish-white cast. It may be recognised by the bluish glaze that accumulates near the base, and sometimes by the letter P (for ‘pearl’) employed from 1840 to 1868.

It was quickly adopted by several other potteries, notably Spode in 1783, Leeds in the late 1780s, and Swansea circa 1800.