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Keum-boo (Korean: 금부; also Geumbu, Kum-Boo or Kum-bu—Korean "attached gold") is an ancient Korean gilding technique used to apply thin sheets of gold to silver, to make silver-gilt. Traditionally, this technique is accomplished by first depleting a surface of sterling silver to bring up a thin layer of fine silver.
Other historical names for it were kasumi-uchi (cloud metal), itame-gane (wood-grain metal), and yosefuki. [4] The early components of mokume-gane were relatively soft metals and alloys (gold, copper, silver, shakudō, shibuichi, and kuromido) which would form liquid phase diffusion bonds with one another without completely melting. This was ...
Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes alongside gold: [13] while it is more abundant than gold, it is much less abundant as a native metal. [14] Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine".
Niello / n iː ˈ ɛ l oʊ / [1] [2] is a black mixture, usually of sulphur, copper, silver, and lead, [3] used as an inlay on engraved or etched metal, especially silver. It is added as a powder or paste, then fired until it melts or at least softens, and flows or is pushed into the engraved lines in the metal.
The measurement of sales of popular music starts high relative to the wedding anniversary scale, concentrating on gold and platinum (see gold album).Likewise, credit card companies usually have a "gold card" and a "platinum card" (many formerly had a "silver card" then followed by a "gold card", but due to similarity in appearance between silver and platinum these were often discontinued with ...
Gold nugget A selection of precious metal elements; gold, silver, platinum, palladium, copper, ruthenium, rhodium, rhenium, osmium, iridium and mercury. They are labeled and arranged by their location on the periodic table. Precious metals are rare, naturally occurring metallic chemical elements of high economic value.
Most metal threads are available in silver and sometimes copper as well as gold; some are available in colors as well. Goldwork is always surface embroidery and free embroidery ; the vast majority is a form of laid work or couching; that is, the gold threads are held onto the surface of the fabric by a second thread, usually of fine silk.
There are three basic techniques that may be used to attach granules to a metal surface: hard soldering, fusing and colloidal soldering. The metals used in granulation are usually gold and/or silver alloys of high purity – alloys below 18 kt. gold and sterling silver being unsuitable. With each technique, the process begins with the making of ...