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BIS hallmark : ウィキペディア英語版 | BIS hallmark
The BIS hallmark is a hallmarking system for gold as well as silver jewellery sold in India certifying to the purity of the metal.〔(Bureau of Indian Standards. Official website. 'BIS Certification Scheme For Hallmarking Of Gold Jewellery'. )〕〔(National Institute of Open Schooling. 'Wise Buying.' )〕 It certifies that the piece of jewellery conforms to a set of standards laid by the Bureau of Indian Standards, the national standards organization of India. India is the second biggest market for gold and its jewllery. India imports in excess of 1000 tons annually (including unofficially smuggled gold) with negligible local production.〔(【引用サイトリンク】title= Gold demand by country )〕 The annual gold imports are around 50 billion US$ next only to crude oil imports widening the trade deficit.〔(【引用サイトリンク】title= Gold imports - Social evil )〕 == Gold == The BIS system of hallmarking of gold jewellery began on April 2000. The standard specifications governing this system are IS 1417 (Grades of Gold and Gold Alloys, Jewellery/Artefacts), IS 1418 (Assaying of Gold in Gold Bullion, Gold alloys and Gold Jewellery/Artefacts), IS 2790 (Guidelines for Manufacture of 23,22,21,20,19,18,17,16,14 and 9 carat Gold Alloys), IS 3095 (Gold solders for use in manufacture of jewellery).〔(Bureau of Indian Standards. 'HALLMARKING OF GOLD JEWELLERY IN INDIA'. )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「BIS hallmark」の詳細全文を読む
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