Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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This document was prepared by Technical Committee ISO/TC 174, Jewellery.

This second edition cancels and replaces the first edition (ISO 8654:1987) which has been technically revised with the following changes:

— add a new colour definition: dark red (6N);
— describe a detailed metallographic preparation for the colour measurement;
— add tables for nominal values and tolerances for L*a*b* and L*C*h;
— add figures representing de tolerances in different colour spaces;
— the document was editorially revised.

BS EN ISO 8654:2018+A1:2019

Jewellery. Colours of gold alloys. Definition, range of colours and designation

Current

Published:

31 Jan 2020