Niello is a black, metallic alloy that is used to create decorative designs on silver or other metals. It is made from a combination of sulfur with metals such as silver, copper, lead, or zinc. The process of using niello involves engraving or etching a design into the metal surface, after which the niello mixture is applied and heated. The heat causes the niello to bond with the metal, resulting in a contrasting design that is both visually striking and durable.
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