QB 1132-2005 Regulations on the thickness of silver coatings for jewelry

This standard specifies the terms and definitions, requirements, test methods and identification of the thickness of the silver coating of jewelry products. This standard is applicable to jewelry products with non-silver substrates. QB 1132-2005 Specification of the thickness of the silver coating of jewelry QB1132-2005 Standard download decompression password: www.bzxz.net

ICS 39.060
Classification number: Y88
Registration number: 16753-2005
Light Industry Standard of the People's Republic of China
QB1132—2005
Replaces QB1132—1991bzxz.net
Provision of silver coating thickness
Jewellery-the provision of silver coatings tickness2005-09-23 Issued
National Development and Reform Commission of the People's Republic of China Implemented on 2006-05-01
All technical contents of this standard are mandatory: Foreword
This standard is a revision of QB QB1132-1991 "Regulations on the Thickness of Silver Covering Layers for Jewelry". QB1132-2005 Compared with QB1132-1991, the main changes in this standard are the addition of Chapter 2 Normative Reference Documents and Chapter 5 Test Methods. This standard is proposed by the China Light Industry Federation. This standard is under the jurisdiction of the National Jewelry Standardization Technical Committee (SAC/TC256). The drafting unit of this standard is the National Jewelry Quality Supervision and Inspection Center. The main drafters of this standard are Fan Jifang and Li Suqing. , Li Yuou, Li Wujun. This standard was first issued in June 1991, and this is the first revision. From the date of implementation of this standard, the light industry standard QB1132-1991 "Regulations on the Thickness of Silver Covering Layer of Jewelry" issued by the former Ministry of Light Industry will be abolished.
1 Scope
Regulations on the Thickness of Silver Covering Layer
This standard specifies the terms and requirements, inspection methods and markings for the thickness of silver covering layer of jewelry products.
This standard is applicable to jewelry products with non-silver matrix.
2 Normative References
QB 1132 --2005
For any dated reference, the clauses in all the following documents shall become the clauses of this standard by reference.
Amendments (excluding errata) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether to amend
these documents can be used.
QB/T1134
For any undated reference,
Guifa Chemical
Jewelry Silver
Method for Determination of Thickness of Gold and Silver Coating on Jewelry
QB/T113$
|3 Terms and Definitions
The following terms and definitions apply to this standard. 3.1
Silver coating caatings The latest version is applicable to this standard.
X-ray fluorescence spectrometry
The silver coating obtained by mechanically wrapping silver foil firmly on the base of jewelry products is called silver-clad coating. 3.2
Silver-plated coating
coaties
The silver coating obtained by electroplating or chemical plating is called silver-plated coating. 4 Requirements for silver coatings
4.2 Silver coatings
4.2.1 The silver content of the silver-clad
layer shall not be less than 925%. . The thickness of the silver coating shall not be less than 2μm.
4.2.2 Silver plating
The friction of the silver coating is not less than
5 Inspection method
Basic method
Degradation method)
The arbitration inspection shall adopt chemical analysis method. The average thickness of the silver coating can be calculated according to the silver mass, silver density and surface area. For detailed description of chemical analysis method, please refer to QBT11345.2. The second method (non-destructive testing method) can be used with the consent of the manufacturer and the purchaser. Refer to QBT1135. If other experimental methods can be proved to be better than the methods provided in this standard, they can also be used. QB1132-2005
6 Marking
6.1 Marking of silver coating: LnAg.
Example: L10Ag, indicating silver coating, thickness of 10um. 6.2 Silver-plated coating marking: PnAg-
Example: PsAg, indicating a silver-plated coating with a thickness of 5um.
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