SIST EN ISO 22764:2026

Jewellery and precious metals - Fineness of solders used with precious metal jewellery alloys (ISO 22764:2020)

This document specifies the precious metal content in solders suitable for use in the production of jewellery made of precious metal alloys.

Schmuck und Edelmetalle - Feingehalt von Loten, die für Edelmetalllegierungen verwendet werden (ISO 22764:2020)

Joaillerie, bijouterie et métaux précieux - Titre des brasures utilisées pour les alliages de métaux précieux pour les articles de joaillerie et de bijouterie (ISO 22764:2020)

Nakit in plemenite kovine - Čistost spajkal, ki se uporabljajo pri zlitinah za nakit iz plemenitih kovin (ISO 22764:2020)

Ta dokument določa vsebnost plemenitih kovin v spajkah, primernih za uporabo pri izdelavi nakita iz zlitin plemenitih kovin.

General Information

• Status: Published
• Public Enquiry End Date: 30-Jan-2026
• Publication Date: 12-Apr-2026
• ICS: 39.060 - Jewellery
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 31-Mar-2026
• Due Date: 05-Jun-2026
• Completion Date: 13-Apr-2026
• Ref Project: EN ISO 22764:2026 - Jewellery and precious metals - Fineness of solders used with precious metal jewellery alloys (ISO 22764:2020)

Overview

prEN ISO 22764 (ISO 22764:2020) - Jewellery and precious metals - Fineness of solders used with precious metal jewellery alloys - specifies the required precious-metal content (fineness) of solders intended for use in manufacturing and repairing jewellery made from gold, platinum, palladium and silver alloys. The standard ensures that solders do not reduce the declared fineness of the finished article and provides minimum fineness requirements by metal type.

Key topics and requirements

• Scope: Defines precious metal content in solders suitable for precious-metal jewellery alloys.
• Mean fineness requirement: Solders shall not reduce the measured mean fineness below the declared fineness of the article.
• Gold jewellery:
  • Generally, solder must have at least the same fineness as the piece being soldered.
  • Exceptions:
    • Red and dark red gold alloys (ISO 8654) with fineness ≥ 750 ‰ may be soldered with a minimum 585 ‰ gold solder.
    • Other gold alloys with fineness > 750 ‰ require minimum 750 ‰ gold solder.
    • Gold chains made from wire < 1 mm diameter can be soldered with any solder, including non-gold solders.
• Platinum jewellery: Solder must have a minimum total precious metal content of 800 ‰.
• Palladium jewellery: Solder must have a minimum total precious metal content of 700 ‰.
• Silver jewellery: Solder must have a minimum fineness of 550 ‰ silver.
• Fineness determination: Analytical methods referenced are the relevant ISO test standards (see Related Standards).

Practical applications and users

• Jewellery manufacturers and bench jewellers: select appropriate solders to maintain hallmark/fineness compliance and to meet mechanical and visual expectations.
• Repair and restoration services: ensure repaired pieces retain declared precious-metal content and consumer trust.
• Assay offices and quality control laboratories: verify fineness using referenced determination methods and certify compliance.
• Solder suppliers and alloy formulators: design and label solders to meet minimum fineness requirements for target jewellery alloys.
• Regulatory bodies and hallmarking authorities: apply the standard when assessing conformity and trade practices.

Practical benefits include preserving declared metal content, avoiding contamination or downgrade of value, ensuring consistent appearance and performance, and meeting legal or consumer expectations for precious-metal jewellery.

Related standards

Key referenced test and complementary standards for fineness determination and colour/designation:

• ISO 11210, ISO 11426, ISO 11427, ISO 11490, ISO 11494, ISO 11495, ISO 13756, ISO 15093, ISO 15096
• ISO 8654 (colours of gold alloys), ISO 9202 (fineness of precious metal alloys)

Keywords: ISO 22764, prEN ISO 22764, fineness, solders, precious metal jewellery alloys, gold solder, platinum solder, palladium solder, silver solder, jewellery manufacturing, fineness determination.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Nakit in plemenite kovine - Čistost spajkal, ki se uporabljajo pri zlitinah za nakit iz
plemenitih kovin (ISO 22764:2020)
Jewellery and precious metals - Fineness of solders used with precious metal jewellery
alloys (ISO 22764:2020)
Schmuck und Edelmetalle - Feingehalt von Loten, die für Edelmetalllegierungen
verwendet werden (ISO 22764:2020)
Joaillerie, bijouterie et métaux précieux - Titre des brasures utilisées pour les alliages de
métaux précieux pour les articles de joaillerie et de bijouterie (ISO 22764:2020)
Ta slovenski standard je istoveten z: EN ISO 22764:2026
ICS:
39.060 Nakit Jewellery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 22764
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2026
EUROPÄISCHE NORM
ICS 39.060
English Version
Jewellery and precious metals - Fineness of solders used
with precious metal jewellery alloys (ISO 22764:2020)
Joaillerie, bijouterie et métaux précieux - Titre des Schmuck und Edelmetalle - Feingehalt von Loten, die
brasures utilisées pour les alliages de métaux précieux für Edelmetalllegierungen verwendet werden (ISO
pour les articles de joaillerie et de bijouterie (ISO 22764:2020)
22764:2020)
This European Standard was approved by CEN on 13 March 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22764:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 22764:2020 has been prepared by Technical Committee ISO/TC 174 "Jewellery and
precious metals” of the International Organization for Standardization (ISO) and has been taken over as
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2026, and conflicting national standards
shall be withdrawn at the latest by September 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 22764:2020 has been approved by CEN as EN ISO 22764:2026 without any modification.

INTERNATIONAL ISO
STANDARD 22764
First edition
2020-01
Jewellery and precious metals —
Fineness of solders used with precious
metal jewellery alloys
Joaillerie bijouterie et métaux précieux — Titre des brasures utilisées
pour les alliages de métaux précieux pour les articles de joaillerie et
de bijouterie
Reference number
ISO 22764:2020(E)
©
ISO 2020
ISO 22764:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
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Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 22764:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements with regard to fineness . 2
4.1 Mean fineness . 2
4.2 Gold jewellery . 2
4.3 Platinum jewel
...