Watch-cases and accessories - Gold alloy coverings - Part 1: General requirements

This part of ISO 3160 specifies general requirements concerning gold alloy coverings. It is applicable to watch-cases and their accessories, including bracelets.

Boîtes de montres et leurs accessoires — Revêtements d'alliage d'or — Partie 1: Exigences générales

La présente partie de l'ISO 3160 spécifie les exigences générales se rapportant aux revêtements d'alliage d'or. Elle est applicable aux boîtes de montres, à leurs accessoires ainsi qu'aux bracelets

General Information

Status
Published
Publication Date
25-Nov-1998
Current Stage
9093 - International Standard confirmed
Start Date
07-Jun-2021
Completion Date
13-Dec-2025

Relations

Effective Date
06-Jun-2022
Effective Date
15-Apr-2008
Effective Date
15-Apr-2008

Overview

ISO 3160-1:1998 - Watch-cases and accessories - Gold alloy coverings - Part 1: General requirements defines general requirements for gold-alloy coverings applied to watch cases and their accessories, including bracelets. It sets definitions, minimum gold content, nominal coating thicknesses, marking rules and references to test and measurement methods. This standard is essential for consistent quality, consumer information and regulatory compliance in horology and metal finishing.

Key topics and requirements

  • Scope: Applies to watch-cases, bracelets and related accessories receiving gold-alloy coverings.
  • Definitions: Distinguishes plaqué or (gold plated), plaqué or laminé (gold-clad/rolled gold) and coiffe or (gold cap). Also defines surface significative (surface essential to appearance/function) and titre (gold fineness in millièmes).
  • Minimum gold content: The alloy fineness (titre) for all covering types must be at least 585 millièmes (commonly referred to as 14 carat).
  • Nominal coating thicknesses (with ±20% tolerance):
    • Plated gold (GP) and rolled gold (GR): 5, 10, 20, 40, 80 µm
    • Gold cap (GC / coiffe or): 200, 250, 300 µm
  • Measurement and testing:
    • Thickness measurement and fineness determination are to follow methods given in ISO 3160-2.
    • Abrasion and wear tests are specified in ISO 3160-3.
  • Marking rules:
    • Marks must include type letters (GP, GR, GC), nominal thickness in µm and a maker’s or responsibility punch.
    • Example marks: GP 10, GR 20, GC 250.
    • Marking is mandatory for coverings ≥ 5 µm, forbidden for coatings < 5 µm; maker’s punch is always required.
    • When parts of a case have different thicknesses, the smallest applicable value must be indicated; composition of each part must be described truthfully.

Applications and users

  • Manufacturers of watch cases, bracelets and accessories for product specification and quality control.
  • Metal finishers and platers implementing gold plating/laminating/capping processes.
  • Quality assurance and testing laboratories using ISO 3160-2/3 for measurement and abrasion testing.
  • Buyers, importers and regulatory bodies verifying marking, composition and minimum performance.
  • Designers and procurement teams requiring standardized coating specifications for durability and appearance.

Related standards

  • ISO 3160-2 - Determination of fineness, thickness, corrosion resistance and adhesion (measurement methods).
  • ISO 3160-3 - Abrasion resistance tests for coating types on standardized specimens.

Keywords: ISO 3160-1:1998, watch cases, gold alloy coverings, gold plating thickness, GP GR GC marking, gold cap, watch bracelets, metal finishing standards.

Standard

ISO 3160-1:1998 - Watch-cases and accessories -- Gold alloy coverings

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Standard

ISO 3160-1:1998 - Boîtes de montres et leurs accessoires -- Revetements d'alliage d'or

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Frequently Asked Questions

ISO 3160-1:1998 is a standard published by the International Organization for Standardization (ISO). Its full title is "Watch-cases and accessories - Gold alloy coverings - Part 1: General requirements". This standard covers: This part of ISO 3160 specifies general requirements concerning gold alloy coverings. It is applicable to watch-cases and their accessories, including bracelets.

This part of ISO 3160 specifies general requirements concerning gold alloy coverings. It is applicable to watch-cases and their accessories, including bracelets.

ISO 3160-1:1998 is classified under the following ICS (International Classification for Standards) categories: 39.040.10 - Watches. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 3160-1:1998 has the following relationships with other standards: It is inter standard links to ISO 3160-1:1998/Amd 1:2000, ISO 3160-1:1995; is excused to ISO 3160-1:1998/Amd 1:2000. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO 3160-1:1998 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 3160-1
Third edition
1998-11-15
Watch-cases and accessories — Gold alloy
coverings —
Part 1:
General requirements
Boîtes de montres et leurs accessoires — Revêtements d'alliage d'or —
Partie 1: Exigences générales
A
Reference number
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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. International Standard requires
approval by at least 75 % of the national bodies casting a vote.
International Standard ISO 3160-1 was prepared by Technical Committee
ISO/TC 114, Horology, Subcommittee SC 6, Precious metal coverings.
This third edition cancels and replaces the second edition
(ISO 3160-1:1995), which has been technically revised.
ISO 3160 consists of the following parts, under the general title Watch-
cases and accessories — Gold alloy coverings:
� Part 1: General requirements
� Part 2: Determination of fineness, thickness, corrosion resistance and
adhesion
� Part 3: Abrasion resistance tests of a type of coating on standard
gauges
©  ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
©
INTERNATIONAL STANDARD  ISO ISO 3160-1:1998(E)
Watch-cases and accessories — Gold alloy coverings —
Part 1:
General requirements
1 Scope
This part of ISO 3160 specifies general requirements concerning gold alloy coverings.
It is applicable to watch-cases and their accessories, including bracelets.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part of
ISO 3160. At the time of publication, the editions indicated were valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 3160 are encouraged to investigate the possibility of applying the
most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 3160-2:1992, Watch cases and accessories — Gold alloy coverings — Part 2: Determination of fineness,
thickness, corrosion resistance and adhesion.
ISO 3160-3:1993, Watch cases and accessories — Gold alloy coverings — Part 3: Abrasion resistance tests of a
type of coating on standard gauges.
3 Definitions
For the purposes of this part of ISO 3160, the following definitions apply.
3.1
gold-plated covering
covering achieved with a method by which a layer of gold alloy is applied to the component by an electrolytic,
chemical or other process
3.2
rolled-gold covering
covering achieved with a method by which a
...


NORME ISO
INTERNATIONALE 3160-1
Troisième édition
1998-11-15
Boîtes de montres et leurs accessoires —
Revêtements d'alliage d'or —
Partie 1:
Exigences générales
Watch-cases and accessories — Gold alloy coverings —
Part 1: General requirements
A Numéro de référence
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération
mondiale d'organismes nationaux de normalisation (comités membres de
l'ISO). L'élaboration des Normes internationales est en général confiée aux
comités techniques de l'ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comité technique créé à cet effet. Les
organisations internationales, gouvernementales et non gouvernementales,
en liaison avec l'ISO participent également aux travaux. L'ISO collabore
étroitement avec la Commission électrotechnique internationale (CEI) en
ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l'approbation de 75 % au moins des
comités membres votants.
La Norme internationale ISO 3160-1 a été élaborée par le comité technique
ISO/TC 114, Horlogerie, sous-comité SC 6, Revêtements en métaux
précieux.
Cette troisième édition annule et remplace la deuxième édition
(ISO 3160-1:1995) dont elle constitue une révision technique.
L'ISO 3160 comprend les parties suivantes, présentées sous le titre
général Boîtes de montres et leurs accessoires — Revêtements d'alliage
d'or :
— Partie 1: Exigences générales
— Partie 2: Détermination du titre, de l'épaisseur, de la résistance à la
corrosion et de l'adhérence
— Partie 3: Essais de résistance à l'abrasion d'un type de revêtement
sur éprouvettes normalisées
©  ISO 1998
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publi-
cation ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun pro-
cédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord
écrit de l'éditeur.
Organisation internationale de normalisation
Case postale 56 • CH-1211 Genève 20 • Suisse
Internet iso@iso.ch
Imprimé en Suisse
ii
©
NORME INTERNATIONALE  ISO ISO 3160-1:1998(F)
Boîtes de montres et leurs accessoires — Revêtements
d'alliage d'or —
Partie 1:
Exigences générales
1 Domaine d’application
La présente partie de l'ISO 3160 spécifie les exigences générales se rapportant aux revêtements d'alliage d'or.
Elle est applicable aux boîtes de montres, à leurs accessoires ainsi qu'aux bracelets.
2 Références normatives
Les normes suivantes contiennent des dispositions qui, par suite de la référence qui en est faite, constituent des
dispositions valables pour la présente partie de l'ISO 3160. Au moment de la publication, les éditions indiquées
étaient en vigueur. Toute norme est sujette à révision et les parties prenantes des accords fondés sur la présente
partie de l'ISO 3160 sont invitées à rechercher la possibilité d'appliquer les éditions les plus récentes des normes
indiquées ci-après. Les membres de la CEI et de l'ISO possèdent le registre des Normes internationales en vigueur
à un moment donné.
ISO 3160-2:1992, Boîtes de montres et leurs accessoires — Revêtements d'alliage d'or — Partie 2: Détermination
du titre, de l'épaisseur, de la résistance à la corrosion et de l'adhérence.
ISO 3160-3:1993, Boîtes de montres et leurs accessoires — Revêtements d'alliage d'or — Partie 3: Essais de
résistance à l'abrasion d'un type de revêtement sur éprouvettes normalisées.
3 Définitions
Pour les besoins de la présente partie de l'ISO 3160, les définitions suivantes s'appliquent.
3.1
plaqué or
revêtement obtenu par une méthode par laq
...

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