This standard specifies the purity range of precious metals in jewelry (excluding flux components, but the content of the finished product shall not be lower than the specified purity range), markings, measurement methods and naming methods of precious metal jewelry. This standard applies to the jewelry industry and domestically produced and sold jewelry. GB 11887-2002 Regulations and naming methods for the purity of precious metals in jewelry GB11887-2002 Standard download and decompression password: www.bzxz.net

1CS 39.060
Y 88
National Standard of the People's Republic of China
GB11887-2002
Replaces GB/T11887-2000
Jewelry
Precious Metals Purity regulations and naming methods
Jewellery--Fineness of precious metal alloys and designation (ISO 9202: 1991, Jewelery-Fineness of precious metal alloys, NEQ) 2002-03-05 released
People of the People’s Republic of China Republic
National General Administration of Quality Supervision, Inspection and Quarantine
586
Implemented on 2002-09-01
Published
This standard is a mandatory standard. | |tt | This standard replaces GB/T11887-2000 "Regulations on Purity and Nomenclature of Precious Metals in Jewelry". The main differences between this standard and GB/T11887-2000 are as follows: --The content of "the total content of platinum and palladium shall not be less than 950%" in 4.3 of the original standard has been cancelled, and is consistent with ISO9202:1991 (E).
Change the requirement in the original standard 4.4 that "the nickel content should be less than 0.3%" to the equivalent of adopting "Directive 94/27/CE of the European Parliament and of the Council of the European Communities".
This standard is proposed by China Light Industry Federation. This standard is under the jurisdiction of the National Jewelry Standardization Technical Committee. This standard was drafted by: National Jewelry Quality Supervision and Inspection Center. The main drafters of this standard: Shen, Fan Jifang, Li Wujun, and Li Yu. This standard was first published in December 1989 and revised for the first time in April 2000. This is the second revision. 587 | | tt | | GB 11887--2002 | It was implemented on September 1, 2000. This standard is the first revision of GB/T11887-1989 "Nomenclature Method of Purity of Precious Metal Jewelry". "Regulations on Purity and Naming Methods of Precious Metals in Jewelry" is an important basic standard for the jewelry industry and plays an important role in promoting the development of my country's jewelry industry and ensuring the quality of jewelry products. In order to continuously improve the standards and make them more operable, which will help promote the development of the jewelry industry and regulate the market, the standards have been revised for the second time. In this revision, the content in 4.3 of the original standard that "the content of platinum and palladium shall not be less than 950%" is cancelled, and the non-main component of precious metals (excluding harmful elements) is not stipulated, which is consistent with ISO9202:1991 (E) ; Change the requirement in the original standard 4.4 that "the nickel content should be less than 0.3%" to be equivalent to the adoption of "Directive 94/27/CE of the European Parliament and of the Council of the European Communities", and implement a two-year transition period at the same time. That is, two years from the date of publication of the standard, all goods sold to end consumers must fully comply with the standard requirements. The specific transition period is as follows: from the date of the release of the standard to half a year after the release - a manufacturer and all dealers clear the inventory of products that do not meet this standard; from the date of the release of the standard to one year after the release, a manufacturer and all dealers Deadline for all suppliers to offer products that do not conform to this standard:
The deadline for all vendors to sell products that do not conform to this standard starts from the date of publication of the standard and ends two years after publication. 588
1 Scope
Jewelry
Provisions and naming methods for the purity of precious metals
GB 11887-2002
This standard specifies the purity range of precious metals in jewelry (Excluding flux components, but the content of the finished product shall not be less than the specified purity range), markings, measurement methods and naming methods for precious metal jewelry. This standard applies to the jewelry industry and domestically produced and sold jewelry. 2 Normative reference documents
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest edition applies to this standard. GB/T9288 Method for analysis of gold content in jewelry (neqISO11426:1993) GB/T11886 Method for chemical analysis of silver content in jewelry GB/T 16552 3
Name of jewelry and jade
Identification of jewelry and jade
GB/ T16553
Diamond Grading
GB/T16554
QB/T 1656
QB/T 1689
3 Terms and Definitions
Platinum Jewelry Chemical analysis methods Determination of the amount of palladium, palladium and platinum Precious metal jewelry terminology
The following terms and definitions apply to this standard. 3.1
Purity fineness
The minimum content of precious metal elements, measured in thousandths of the precious metal content. 4Purity range
Purity is expressed as the lowest value and no negative tolerance is allowed. 4.1 The purity ranges of precious metals and their alloys are shown in Table 1. Table
Precious metals and their alloys
Gold and its alloys
Minimum purity per thousand
375
585
750||tt ||916
990
(999)
Other expressions of purity
9K
14K
18K
22K
Pure gold
(thousand pure gold)
589
GB 11887--2002
Precious metals and their alloys
Platinum (Platinum ) and its alloys
Silver and its alloys
Note 1: Values ??not in brackets will be given priority. Note 2: The theoretical purity of 24K is 100%. Table 1 (continued)
Minimum purity sweat fraction
850
900
950
990
800
925
990
4.2 Due to the needs of use, the gold content of pure gold jewelry accessories shall not be less than 750%. . Other expressions of purity
Pure platinum (pure platinum)
Pure silver
4.3 The elements contained in precious metals and their alloy jewelry must not be harmful to human health. Nickel-containing jewelry (including non-precious metal jewelry) should comply with the following regulations.
For products used to pierce ears or any other part of the human body, and to be removed or retained during the healing process of the piercing wound, the nickel content in the overall 4.3.1
mass must be less than 0.5%|| tt||4.3.2 Products that are in long-term contact with human skin such as: earrings;
necklaces, bracelets and bracelets, anklets, rings; watch cases, watch chains, buckles;
snap buttons , buckles, rivets, zippers and metal tags (if not nailed to clothing). The nickel release of the parts of these products that are in long-term contact with the skin must be less than 0.5 micrograms/cm2/week; if the products specified in Article 4.3.34.3.2 are plated on the surface, the coating must ensure that the parts that are in long-term contact with the skin are in normal use. Within two years, nickel release is less than 0.5 micrograms/cm/week. 4.3.4 In addition to those listed in 4.3.1, 4.3.2 and 4.3.3 above, other similar products must meet the same requirements, otherwise they shall not enter the market.
5 Jewelry Marks
The mark of precious metal jewelry refers to the logo printed on the jewelry. 5.1 Contents of the mark
The content of the mark should include: manufacturer code, purity, material, and quality of the main diamond (above 0.10 carat) of the diamond-set jewelry. For example: the jewelry mark of 18K gold inlaid with 0.45 carat diamond produced by Beijing Filigree Inlay Factory is: Beijing A 18K gold 0.45ct (D). 5.2 Expression method of puritybzxZ.net
Print the mark according to the provisions of Table 1, or print the mark according to the actual content. Gold jewelry is prefixed with gold, Au or G in order of purity (K number). Example: Gold 750.Au750, G18K. 5.2.11
Platinum jewelry is preceded by platinum (white gold) or Pt in thousandths of purity. Example: Pt900, Pt990 or pure platinum (pure platinum). 5.2.24
5.2.3Silver jewelry is preceded by silver, Ag or S in thousandths of purity. Example: Silver 925, Ag925.S925. 5.2.4 When using precious metals of different materials or different purity to make jewelry, the material and purity should be expressed separately. 5.2.5 When the jewelry cannot be marked due to reasons such as being too thin or too small, it should be accompanied by a mark containing the mark. 6. Determination method of purity of precious metal jewelry
should be measured using a recognized method. When there are differences in test results, the method of (G3/T9288, GB/T11886, 590
QB/T1656 shall be used) Arbitration.
Naming Rules
7.1 Precious metal jewelry should be named according to purity, material, gem name, and variety. For example: 18K gold ruby ??ring
7.2
Precious metal jewelry The naming of varieties is based on the provisions of QB/T1689. GB 11887-2002
3 The identification and naming of inlaid gemstones are carried out in accordance with GB/T16552, GB/T16553, and GB/T16554. 7.3||tt ||Quality grade as reference level
591
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.