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Underglaze is available in a variety of colours from commercial retailers and is used in industrial production of pottery. [19] Low firing temperature underglazes have been formulated as well as application options such as in the form of liquid pens of glaze or solid chalk blocks.
The pigment fuses with the glaze, and appears to be underneath a layer of clear glaze; generally the body material used fires to a whitish colour. The best known type of underglaze decoration is the blue and white porcelain first produced in China, and then copied in other countries.
Underglaze decoration may then be applied, followed by glaze, which is fired so it bonds to the body. The glazed porcelain may then be painted with overglaze decoration and fired again to bond the paint with the glaze. Most pieces use only one of underglaze or overglaze painting, the latter often being referred to as "enamelled".
Blue Ridge china. Blue Ridge is a brand and range of American tableware manufactured by Southern Potteries Incorporated from the 1930s until 1957.Well known in their day for their underglaze decoration and colorful patterns, Blue Ridge pieces are now popular items with collectors of antique dishware.
In this century a number of experiments were made combining underglaze blue and other colours, both underglaze and overglaze enamels. Initially copper and iron reds were the most common, but these were much more difficult to fire reliably than cobalt blue, and produced a very high rate of mis-fired wares, where a dull grey replaced the intended ...
This combined underglaze blue outlines with overglaze enamels in further colours. [68] The wucai technique was a similar combination, with underglaze blue used more widely for highlights. [69] Two-colour wares, using underglaze blue and an overglaze colour, usually red, also produced very fine results.
These are underglaze painting, where the paint is applied before the glaze, which then seals it, and overglaze decoration where the painting is done in enamels after the glazed vessel has been fired, before a second lighter firing to fuse it to the glaze. There is also the use of coloured glazes, which often carry painted designs.
The technique also differs from that of most Japanese porcelain, with the outlines of the pattern done in underglaze blue before the overglaze "enamelled" final decoration. [2] Nabeshima ware was not made for sale, but for the specific use of the Nabeshima clan and as gifts for the Tokugawa shogunate and various daimyō. [3]