Rare Chinese Turquoise and Cinnabar Belt Hook

• Cinnabar - Cinnabar is an intense deep red colouring agent that has been in use for thousands of years, derived from crystalised red mercuric suphide. It is made into a coating by grinding ore into a fine powder then mixing the powder with lacquer made from the sap of the Rhus tree, which grows in East Asia.
  
  As applied to Oriental antiques, cinnabar refers to successive layers of laquer applied to the metal base of an object. Once the coating has dried and hardened, a further layer is applied. The layers continue to be applied until the thickness is 3 to 6 mm, and this may take up to 200 to 300 coats. At this stage, the surface is ready for the carving, that is characteristic of cinnabar items.
  
  Because of the labour required, cinnabar items are usually small, such as vases, boxes, trays and snuff bottles.
  
  However buyers should be aware that the cinnabar technique has been copied using modern plastic type materials that are moulded rather than carved. A close examination of a genuine cinnabar item under a strong magnifying glass or jewellers loupe should show evidence of the many layers that make up its thickness, and possibly tool marks left by the carver.
• 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.

This item has been included into following indexes:

• oriental dressing accessories - belt hooks, various materials 11
• oriental objects - bronze, other objects 2,529