In pottery, leather-hard is the condition of a clay or clay body when it has been partially dried to a consistency similar to leather of the same thickness as the clay. At this stage, the clay object
Canteen, China, Jiangxi Province, 15th century, porcelain with cobalt under colorless glaze. As with nearly all Chinese blue and white porcelain, this was painted when leather-hard, and probably the spout and rings were added.
Burnishing is a form of pottery treatment in which the surface of the pot is polished, using a hard smooth surface such as a wooden or bone spatula, smooth stones, plastic, or even glass bulbs, while
Tripod vessel with lid, Maya culture, Mexico or Guatemala, c. 4th-5th century, hand-built ceramic with incised decoration and burnished slip, Honolulu Museum of Art, accession 4183.1