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2. Jewelry wire - Wikipedia

   en.wikipedia.org/wiki/Jewelry_wire

   Most jewelry wire that is sold now is designated dead soft, half-hard, or hard, where dead soft is wire that is manufactured with a hardness of 0, half-hard is wire manufactured with a hardness of 2, and fully hardened wire is wire with a hardness of 4. Boxes of jewellery wire. The left hand box has gold-plated, silver-plated and copper wire.

3. Gold plating - Wikipedia

   en.wikipedia.org/wiki/Gold_plating

   Gold plated - gold layer thickness greater than or equal to 0.5 micron; Heavy gold plated / Vermeil - gold layer thickness greater than or equal to 2.5 micron; Gold plated silver jewellery can still tarnish as the silver atoms diffuse into the gold layer, causing slow gradual fading of its color and eventually causing tarnishing of the surface ...

4. Gold-filled jewelry - Wikipedia

   en.wikipedia.org/wiki/Gold-filled_jewelry

   Most high quality gold-filled pieces have the same appearance as high carat gold, and gold-filled items, even with daily wear, can last 10 to 30 years though the layer of gold will eventually wear off exposing the metal underneath. The layer of gold on gold-filled items is 5 to 10 times thicker than that produced by regular gold plating, and 15 ...

5. Tinning - Wikipedia

   en.wikipedia.org/wiki/Tinning

   Hot tin-dipping is the process of immersing a part into a bath of pure molten tin at a temperature greater than 450 °F or 232 °C. Tinplate made via hot-dipped tin plating is made by cold rolling steel or iron, pickling to remove any scale, annealing to remove any strain hardening, and then coating it with a thin layer of tin.

6. Titanium nitride - Wikipedia

   en.wikipedia.org/wiki/Titanium_nitride

   Because of the metallic gold color of TiN, this material is used to coat costume jewelry and automotive trim for decorative purposes. TiN is also widely used as a top-layer coating, usually with nickel- or chromium-plated substrates, on consumer plumbing fixtures and door hardware.

7. Gold–aluminium intermetallic - Wikipedia

   en.wikipedia.org/wiki/Gold–aluminium_intermetallic

   (1) Gold wire (2) Purple plague (3) Copper substrate (4) Gap eroded by wire-bond (5) Aluminium contact Gold–aluminium phase diagram. Gold–aluminium intermetallic is a type of intermetallic compound of gold and aluminium that usually forms at contacts between the two metals. Gold–aluminium intermetallic have different properties from the ...