GB 11887-2008 Jewellery-Fineness of Precious Metal Alloys and Designation (Text of Document is in English) - Beijing translation compay

1 Scope

This Standard specifies the range of fineness , hallmark, determination method of precious metal alloys used in jewellery, designation of precious metal jewellery.
This Standard is applicable to the jewellery industry and the jewellery produced and sold in domestic market.

2 Normative References

The articles contained in the following documents have become this standard when they are quoted herein. For the dated documents so quoted, all the modifications (excluding corrections) or revisions made thereafter shall not be applicable to this Standard. For the undated documents so quoted, the latest editions shall be applicable to this Standard.
GB/T 9288 Gold jewellery alloys—Determination of gold—Cupellation method (fire assay) (GB/T 928-2006, ISO 11426: 1997, MOD)
GB/T 16552 Gems—Nomenclature
GB/T 16553 Gems—Testing
GB/T 16554 Diamond grading
GB/T 18781 Cultured pearl grading
GB/T 17832 Silver jewellery alloys - Determination of silver - Volumetric (potentionmetric) method using potassium bromide (GB/T 17832-2008, ISO 11427: 1993, MOD)
GB/T 19719 Jewellery--Determination of the release of nickel--Method of spectrometry (GB/T 19719-2005, EN 1811: 1998, MOD)
GB/T 19720 Platinum jewellery alloys--Determination of platinum and palladium--Gravimetric method after precipitation of diammonium hexachloroplatinate and dimethylglyoxime (GB/T 19720-2005, ISO 11210: 1995, MOD)
GB/T 21198.6 Determination of precious metals in precious metals jewellery alloys—Method using ICP spectrometry—Part 6: Difference method
QB/T 1689 Terms of precious metal adornment
SN/T 2004.3-2005 Determination of Chromium (VI) in electrical and electronic equipment--Part 3: 1 5-Diphenylcarbohydrazide spectrophotometric method

3 Terms and Definitions

For the purposes of this Standard, the following definitions apply
3.1 Fineness
Minimum content of the named precious metal, measured in terms of parts per thousand by weight of alloy
3.2 Marking
Hallmark which marked on precious metals jewellery
3.3 Mark
General terms of all instructions for identifying products as well as quality, quantities, characteristics and method of use.. Mark can be shown as characters, symbols, numbers, pattern and other types.