GB 11887-2008 English PDF (GB11887-2008)

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GB 11887-2008: Jewellery -- Fineness of precious metal alloys and designation
GB/T  11887‐2008 
GB 
ICS 39.060
Y 88
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
P GB 11887-2008
Replacing GB 11887-2002
Jewellery - Fineness of Precious Metal Alloys
and Designation
(ISO 9202. 1991, Jewellery - Fineness of Precious Metal Alloys, MOD)
Important Note. 
This standard is obsolete and replaced by GB/T 11887‐2012 
Issued on. December 31, 2008 Implemented on November 1, 2009
Jointly issued by. General Administration for Quality Supervision, Inspection
and Quarantine (AQSIQ);
Standardization  Administration  Committee  of  the  People's 
Republic of China. 
Table of Contents 
Foreword ...3 
Introduction ...1 
1 Scope ...2 
2 Normative References ...2 
3 Term and Definition ...3 
4 Fineness Range ...3 
5 Jewellery Mark ...5 
6 Determination Method ...6 
7 Designation Rules ...7 
Appendix A ...8 
Appendix B ...9 
Foreword 
The provisions in chapters 4, 5 and 7 are compulsory, and the others are recommended in this
Standard.
This Standard is modified in relation to ISO 9202. 1991(E) "Jewellery - Fineness of Precious
Metal Alloys" (English edition). This Standard is redrafted on the base of ISO 9202. 1991;
Appendix A gives the list of comparison between the provisions of this National Standard and
the International Standard for ease of comparison.
This Standard adopts the International Standard by revision according to the actual conditions of
jewellery production and marketing in China. The technical differences are marked with
perpendicular single line on the page margin of involved articles or items. Appendix B gives the
list of these technical difference and the reasons hereof for reference.
This Standard replaces GB 11887-2002 "Jewellery - Fineness 0f Precious Metal Alloys and
Designation". Compared with GB 11887-2002, the major differences hereof are as follows.
— Supplement the relevant recently-issued standards into the normative references;
— Add fineness scope of silver, platinum and palladium jewelleries and revise the methods
for designation and marking according to the actual conditions of the jewellery
production and marketing in China;
— Revise the requirements on nickeliferous and add the requirements in harmful elements
according to "Directive (2005) (new edition) on Nickel" issued by the European
Parliament and the Council of the European Union; and
— Add the requirements on accessories to silver, platinum and palladium jewelleries.
Appendixes A and B are informative in this Standard.
This Standard was proposed by the China National Light Industry Council.
This Standard is under the jurisdiction of the National Technical Committee 256 on Jewelry of
Standardization Administration of China (SAC/TC 256).
Drafting organization. National Jewelry Quality Supervision and Inspection Center.
Chief drafting staffs. Shen Feng, Duan Tiyu, Li Yuou, Li Suqing, and Li Wujun.
All previously replaced editions hereof are as.
— GB/T 11887-1989, and GB 11887-2002.
Introduction 
GB/T 11887-1989 "Jewellery - Fineness of Precious Metal Alloys and Designation" was
firstly issued and implemented in 1989. It is the third revision to GB/T 11887-1989
"Designation Method for Fineness of Precious Metal Jewellery". GB 11887-2008 "Jewellery -
Fineness of Precious Metal Alloys and Designation", an important primary standard to the
jewellery industry, promotes the development of the jewellery industry in China and pays a
major role in guaranteeing quality of jewellery products. The former standard was revised in
order to perfect the standard and make it more operable and favourable to promote the
development of the jewellery industry and regulate the jewellery market. In this revision
hereof, the requirements on nickeliferous are revised and the requirements in harmful
elements are added according to "Directive (2005) (new edition) on Nickel" issued by the
European Parliament and the Council of the European Union; in addition, the requirements on
accessories to precious metal jewellery are revised. The content revised above are
implemented by two-year transition, i.e. all products relevant must be completely in
conformity with the requirements of the Standard from the issuing date hereof to two years
later. The specific transition period is as blow.
From the issuing date hereof to half a year later after it — the production enterprise and all
dealers take clearance for the products not conforming to the requirements of this Standard;
From the issuing date hereof to a year later after it — the production enterprise and all dealers
give the deadline of the products not conforming to the requirements of this Standard;
Two years after the issuing date hereof — the deadline of the products not conforming to the
requirements of this Standard that all dealers sell.
Jewellery - Fineness of Precious Metal Alloys and Designation
1    Scope 
This Standard specifies fineness range 1) of noble metals in jewellery, mark for jewellery, test
method and designation method for precious metal jewellery.
This Standard is applicable to jewelleries produced and distributed in jewellery industry and
at home (China).
2    Normative References 
Provisions of the following documents, through reference in this Standard, constitute
provisions of this Standard. For dated reference, subsequent amendments (excluding
correction contents) to, or revisions of, any of these publications do not apply. However, all
parties coming to an agreement according to this standard are encouraged to study whether
the latest edition of these documents is applicable. For undated references, the latest edition of
the normative document is applicable to these specifications.
GB/T 9288 Gold Jewellery Alloys - Determination of Gold - Cupellation Method (Fire
Assay) (GB/T 9288-2006, 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 - Volumedtric
(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)
5.2.1 Gold jewellery. combination of fineness thousandths (K value) and "Gold", "Au" or
"G". For example. Gold 750 (18K), Au750 (Au18k), G750 (G18k).
5.2.2 Platinum jewellery. combination of "fineness thousandths" and platinum (platinum
gold, white gold) or Pt. For example. platinum (platinum gold, white gold) 900, Pt900.
5.2.3 Palladium jewellery. combination of "fineness thousandths" and palladium (palladium
gold) or Pd. For example. palladium (palladium gold) 950, Pd950.
5.2.4 Silver jewellery. combination of "fineness thousandths" and silver, Ag or S. For
example. silver 925, Ag925, S925.
5.2.5 Where jewellery is made of precious metals with different material and/or fineness, its
materials and fineness shall be denoted out respectively.
5.2.6 Where jewellery cannot be printed with marks because it is too meticulous or small,
the marks containing marking content shall be accompanied.
5.3 Labeling
Product labelling shall be in Chinese language, for example, 铂 950 (platinum 950), 铂 Pt950