method of obtaining a waxy, semi-glazed ceramic surface using only the finest particles of clay slip separated by flotation.
earthenware made from the reddish-brown clay found on the Aegean island of Lemnos
A Sliplike glaze produced during the Etruscan and Greek periods. A deflocculant, such as Calgon, is added to the slip so that the finer particles of clay can be decanted off and collected. It can be applied by brushing or spraying to greenware or bisque. After applying, the surface is burnished with a chamois or metal spoon. When dried, terra sigillata gives a wax like surface which is not completely waterproof. Terra sigillata made from grolleg clay, along with other types or kaolin clays, can be fired as high as cone 10. All other types of terra sigillata are best when fired at bisque temperatures.
A porous red clay ware characterized by embossed decorations of the same color and a satin-like unglazed surface; originated on the Island of Samoa.
ceramics A fine, orange-bodied earthenware produced at Estremoz, Portugal beginning in the 16th century; very rare on archaeological sites and a luxury item during the 17th century.
The Romans used very fine particls of red clay as a glaze. They took a quanity of red clay mixed it with water and let it settle. The heaviest particles settle to the bottom. As the varios other layers settle, the layer just below the pure water if the finest. It was reduced during firing and turned black.
A thin coating of colored clay or clays applied like a glaze. A terra sigillata solution is composed of fine particles of decanted clay and water.
Terra sigillata is a decoration process used in ceramics or in the making of pottery. It is a fine particle clay that is applied to clay that when burnished or polished creates smooth silky surfaces. Terra sigillata is primarily used in low fire applications such as earthenware clays.