Adornment with precious metal coating
1 Scope
This standard specifies terms and definitions, product classification and designation, general requirements, test methods, and marking, packaging, handling and storage of adornment with precious metal coating.
This standard is applicable to adornments with gold coating, silver coating or rhodium using various metals (except precious metal like gold, silver, platinum, palladium and rhodium) as substrate. It may apply to adornments with precious metal coating using non-metal as substrate as a reference.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5270 Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 16921 Metallic coatings - Measurement of coating thickness - X-ray spectrometric methods
GB 28480 Adornment - Provision for limit of baneful elements
QB/T 1689 Terms of precious metal adornment
QB/T 3831 Color change and corrosion resistance test method of metallic coatings and conversion coatings - hydrogen sulfide test method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in QB/T 1689 and the following apply.
3.1
adornment of precious metal coating
adornment with precious metal coating, made of various metals except precious metals (gold, silver, platinum, palladium, rhodium, etc.) as substrate by chemical, physical or other processing methods. The adornments of precious metal coating include adornment with gold coating, adornment with silver coating, and adornment with rhodium coating
4 Product classification and designation
4.1 The adornments of precious metal coating are classified into adornment with gold coating, adornment with silver coating, adornment with rhodium coating, etc., according to the coating material.
The adornments with gold coating are classified into adornment with micro gilded coating, adornment with thin gilded coating, adornment with gilded coating, and gold-cladding adornment according to the thickness of coating and processing methods.
The adornments with silver coating are classified into adornment with thin silver-gilt coating, adornment with silver-gilt coating, and silver-cladding adornment according to the thickness of coating and processing methods.
4.2 The designation of adornment of precious metal coating shall include the coating metal, adornment substrate, adornment name and processing method.
Example 1:
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification and designation
5 General requirements
6 Test methods
7 Marking, packaging, handling and storage
