BARBOTINE: A technique of decorating pottery by adding thick slip to the surface of a pot before firing. The term also refers to the creamy mixture of kaolin clay itself, for pottery ornamented with barbotine, and the technique of applying an incrustation of this mixture to a ceramic surface for decorative effect. The slip was not applied evenly, but in order to form a thick incrustation in patches or trails. On certain types of pottery, such as the Nene Valley ware, the barbotine decoration may form a picture or a pattern. Sometimes the result is simply a roughened surface, rather like icing upon a cake. The method was particularly popular in Roman Gaul and Britain. [barbotine decoration]
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