Slipware is pottery known for its primary decorating method in which slip is added before firing by dipping, painting or splashing on the leather-hard clay body surface. Slip is an aqueous clay body suspension that combines clays and other minerals, such as quartz, feldspar, and mica. Several methods, including dipping, painting, piping or splashing, slip on a wet or leather-hard clay body surface.
Slip-painting, where the slip is treated as paint and used to create a pattern using brushes or other instruments, and slip-trailing, where the slip, typically relatively thick, is dripped, piped or trailed onto the body generally from some device such as the piping bag used to decorate cakes, are the main techniques. Barbotine is the French word for slip, and this term can be used for both methods, but usually for different periods.
In contrast to the many styles where a simple slip is applied to the whole body, for example, most fine goods in ancient Roman pottery, such as African red slipware, are often described as slipware only in pottery where the slip produces patterns or pictures (note: “slipware” not “slipware”). Decorative slips can be a different colour or provide other decorative qualities than the underlying clay body. The effect of painted ceramic, such as in the black-figure or red-figure pottery styles of Ancient Greek pottery, can be produced by selectively adding coloured slips. In Chinese pottery, slip decoration is also an ancient technique, used over 4,000 years ago to cover whole vessels. (wikipedia)
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Ceramics are objects made of moistened clay, shaped and then baked. All ceramics are Earthenware, terracotta, brick, tile, faience, majolica, stoneware, and porcelain. Ceramicware is decorated with clay inlays, relief patterns on the surface, or incised, stamped or embossed designs. For coating, the ware, a creamy mixture of clay and water (slip) can be used.