ISO 8654:2018
Jewellery — Colours of gold alloys — Definition, range of colours and designation
ISO 8654:2018 specifies a limited number of colours of gold alloy and the method to measure colours.
ISO 8654:2018 applies to objects made of gold alloys or coated by gold alloys.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
5 Colour measurement
5.1 General
5.2 Quantitative method
5.2.1 Preparation of the samples
5.2.2 Measurement apparatus
5.2.3 Measurement method
5.3 Qualitative method
6 Gold alloy colours
Annex A (informative) Recommended chemical composition of colour slips
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
5 Colour measurement
5.1 General
5.2 Quantitative method
5.2.1 Preparation of the samples
5.2.2 Measurement apparatus
5.2.3 Measurement method
5.3 Qualitative method
6 Gold alloy colours
Annex A (informative) Recommended chemical composition of colour slips
Bibliography