A Tibetan iron container for food bowl, 16th/17th century, Dege, with etched gilding of 'shou' symbols, 7.28 in. diameter x 3.74 in. high. Provenance: Private collection, Sydney. Note: This type of metalwork was produced in exceedingly high quality and vast number in Tibet as early as the 14th and 15th century. Iron is one of the five treasures of Tibetan Buddhism, among gold, silver, copper and brass. Hence it is not surprising that the Tibetans made so many pieces of iron and lavishly decorated them with gold and silver. The unique technology has been known as 'damascening' to Europeans, but called 'Dege' in China, the name of the town through which the metal work was brought to the China-proper. Different from the common inlaid-works, Dege works have their surface of the wrought iron abraded and then gold and/or silver applied in highly decorative patterns
- Gilding - Gilding is a method of ornamentation whereby a thin sheet of gold metal is applied to items made of wood, leather, ceramics, glass and silver for decorative purposes.
For furniture including mirrors, the sheet of gold is usually applied over a coating of gesso. Gesso is a mixture of plaster of Paris and gypsum mixed with water and then applied to the carved wooden frames of mirrors and picture frames as a base for applying the gold leaf. After numerous coats of gesso have been applied, allowed to dry and then sanded a coat of "bole", a usually red coloured mixture of clay and glue is brushed on and allowed to dry, after which the gold leaf is applied. Over time parts of the gilding will rub off so the base colour can be seen. In water gilding, this was generally a blue colour, while in oil gilding, the under layer was often yellow. In Victorian times, gilders frequently used red as a pigment beneath the gold leaf.
Metal was often gilded by a process known as fire gilding. Gold mixed with mercury was applied and heated, causing the mercury to evaporate, the long-term effect of which was to kill or disable the craftsman or woman from mercury poisoning. The pursuit of beauty has claimed many victims, not the least of which were the artists who made those pieces so highly sought after today.
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