Materials and methods of jewellery

Yleistä keskustelua koruharrastuksesta: korujen suunnittelusta, väreistä, mitoituksesta jne. - eli niistä koruharrastukseen liittyvistä aiheista, joille ei ole omaa osiotaan. Myös jäsenesittelyt kuuluvat tähän osioon.

Valvojat: Cattleya, Muikku, Eowyn, inkku, Henna

JensenBreck
korukivikasan keskellä
Viestit: 166
Liittynyt: Pe Loka 13, 2017 11:58
Oikea käyttäjä: Olen
Lasku: 18

Materials and methods of jewellery

ViestiKirjoittaja JensenBreck » To Joulu 28, 2017 11:30

Hi,
In creating jewellery, gemstones, coins, or other precious items are often used, and they are typically set into precious metals. Alloys of nearly every metal known have been encountered in jewellery. Bronze, for example, was common in Roman times. Modern fine jewellery usually includes gold, white gold, platinum, palladium, titanium, or silver. Most contemporary gold jewellery is made of an alloy of gold, the purity of which is stated in karats, indicated by a number followed by the letter K. American gold jewellery must be of at least 10K purity (41.7% pure gold), (though in the UK the number is 9K (37.5% pure gold) and is typically found up to 18K (75% pure gold). Higher purity levels are less common with alloys at 22 K (91.6% pure gold), and 24 K (99.9% pure gold) being considered too soft for jewellery use in America and Europe. These high purity alloys, however, are widely used across Asia, the Middle East and Africa.[citation needed] Platinum alloys range from 900 (90% pure) to 950 (95.0% pure). The silver used in jewellery is usually sterling silver, or 92.5% fine silver. In costume jewellery, stainless steel findings are sometimes used.

Thank you,

For More Reference: Pharmaceutical Advertising Example

Palaa sivulle “%s” Korukeskustelut

Paikallaolijat

Käyttäjiä lukemassa tätä aluetta: Ei rekisteröityneitä käyttäjiä ja 9 vierailijaa