First period Worcester sparrow beak jug Mandarin pattern in overglaze enamels, unmarked, circa 1780, 3.15 in. height (hairline crack to handle)
- Overglaze on Porcelain - Overglaze decoration on porcelain refers to a decorative technique where designs are painted onto a fired and glazed porcelain surface, and then fired again at a lower temperature to fuse the decorative design onto the glaze surface. This technique allows for a wide range of colors and intricate designs that would not be possible with underglaze decoration, which is applied before the glaze is fired.
- Circa - A Latin term meaning 'about', often used in the antique trade to give an approximate date for the piece, usually considered to be five years on either side of the circa year. Thus, circa 1900 means the piece was made about 1900, probably between 1895 and 1905. The expression is sometimes abbreviated to c.1900.
- Firing Crack - A firing crack is a crack in a porcelain or stoneware item that occurs whilst the item is in the kiln.They are usually caused by faulty design, where one part is thicker than the surrounding area, and being thicker it cools more slowly, setting up a stress with the surrounding area. Firing cracks are not often seen on modern mass produced porcelain, as the damaged items are discarded during prooduction. However they are seen in earlier items and artisan-produced objects.
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