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GB/T 42220-2022Appraisal for precious metal besetting jades process quality (English PDF)

金镶玉镶嵌工艺质量评价

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 30, 2022

Implementation date

July 1, 2023

Scope

GB/T 42220-2022 is the English-translated version of 金镶玉镶嵌工艺质量评价.

GB/T 42220-2022 sets the requirements for the craft of setting jade into precious metal and describes how the quality of that craft is evaluated.

Its requirements clause is divided into materials, workmanship, mass tolerances and safety performance, the test clause mirrors the same four headings, and a marking clause closes the document; the definitions name the techniques involved, from inlaying wire or sheet into a groove carved in the jade to bezel, prong, winding, channel and barrel setting.

It is meant for the process identification, quality evaluation and product marking of gold-inlaid jade. Among the standards it quotes are GB 11887 on precious metal fineness, GB/T 16552 and GB/T 16553 on gem names and testing, and GB 28480 on harmful element limits. Issued on 30 December 2022, it has applied since 1 July 2023.

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Document preview — GB/T 42220-2022

National Standard of the People's Republic of China

ICS: 39.060
Classification: Y 88

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Requirements
4.1 Materials
4.2 Process
4.3 Mass tolerances
4.4 Safety performance
5 Test method
5.1 Materials
5.2 Process
5.3 Mass tolerance
5.4 Safety performance
6 logo

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

1 Scope

This document specifies the requirements for the gold inlaid jade inlay process, and describes the quality evaluation method for the gold inlaid jade inlay process.

This document is applicable to the process identification, quality evaluation and product identification of gold inlaid jade.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB 11887 Purity regulations and nomenclature of jewelry precious metals

GB/T 16552 Names of Jewelry and Jade

GB/T 16553 Identification of Jewelry and Jade

GB 28480 Regulations on Limits of Harmful Elements in Jewelry

GB/T 31912 Jewelry Marking

GB/T 36128 Provisions on tolerances for quality measurement of jewelry and precious metal products

QB/T 1690 Precious Metal Jewelry Quality Measurement Tolerance Provisions

QB/T 4114 Setting fastness of pure gold inlaid jewelry

QB/T 4189 Quality Evaluation Specification for Precious Metal Jewelry Craftsmanship

QB/T 5102 Technical requirements for precious metal inlaid ornaments

QB/T 5342 Technical requirements for gold and silver inlaid jade jewelry

3 Terms and Definitions

The following terms and definitions defined in QB/T 4189 apply to this document.

3.1 inlay technology

A manufacturing process that combines precious metals with other materials in a mechanical physical combination.

Note: Including precious metal embedded technology and precious metal external embedded technology.

3.2 precious metal embedded technology

Using jade or other materials as the substrate, grooves are carved on the surface, and precious metal materials such as gold and silver are made by wire making, sheet making, shape cutting and other processes. into a textured body that matches the engraved groove, inserting the wire (sheet) into the groove by hand, and through grinding, polishing and other processes, the precious metal material and the substrate Tightly and firmly combined mosaic technology.

3.3 After

the precious metal is processed into a certain shape, it is inlaid on the surface of other materials through bezel setting, prong setting, winding setting, channel setting, barrel setting and other techniques

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

QB/T 1690 · QB/T 4114

Similar standards

GB 28480-2026|GB/T 14459-2026|GB/T 19719-2026|GB/T 45611-2025|GB/T 44910-2024|GB/T 44913-2024

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