1、BRITISH STANDARD BS EN L904:2000 Precious metals - The finenesses of solders used with precious metal jewellery alloys The European Standard EN 1904:2000 has the status of a British Standard NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMIITED BY COPYBIGET LAW -_I STDOBSI BS EN 1904-ENGL 2000 = Lb2
2、4bb9 0879b28 310 BS EN 1904:2000 direconofthe Sector AmdNo. Committee for Materiais and Chemicals, was published under the authority of the Standards Committee and comes into effect on 16 November ZOO0 (o BSI 11-2000 National foreword Date comments This British Standard is the officiai English langu
3、age version of EN 1904:2000. The UK participation in its preparation was entrusted to Technical Committee STIB3, Jewellery, which has the responsibility to: - aid enquirers to understand the tee - present to the responsible European committee any enquiries on the - monitor related international and
4、European developments and promulgate interpretation, or proposais for change, and keep the UK interests inform them in the UK. NOTE The UK has been granted an Adeviation hm EN 1904 as some of its requirements conflict with those of the Hallmarking Act 1973. Details are given in annex ZB to EN 1904.
5、A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Sbdards which implement internationai or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entithi “internati
6、onal Standards Correspondence Index“, or by using the “Find“ facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract Users of British Standarcis are responsible for their correct application. Compliance with a Brit
7、ish Standard does not of itself confer immunity from legai obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice dispiayed in this document indias when the document was last issued ISBN O
8、 580 34999 3 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN I904 September 2000 ICs 39.060 English version Precious metals - The finenesses of solders used with precious metal jewellery alloys Mtaux prcieux - Titre des soudures utilises pour les alliages de mtaux prcieux pour les articles de j
9、oaillerie Edelmetall - Nennfeingehalte von Loten fr Edelmetall- Schmucklegierungen This European Standard was approved by CEN on 25 February 2000. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this Europsen Standard the status of a
10、 national standard without any alteration. Up-todate lists and bibliographical references concerning sich national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version i
11、n any other language made by tmslation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as he official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germ
12、any, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMlTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels Q 2000 CEN All
13、rights of exploitation in any form and by any means resewed worldwide for CEN national Members. Ref. No. EN 1904:2000 E STD-BSI BS EN L904-ENGL 2000 1b24bb9 0879b30 T79 111 Page 2 EN 1904:2000 Foreword This European Standard has been prepared by Technical Committee CENTTC 283, Precious metals - Appl
14、ications in jewellery and associated products, the Secretariat of which is held by UNI. 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 March 2001, and conflicting national standards shall be with
15、drawn at the latest by March 2001. According to the CENCENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lu
16、xembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope This European Standard specifies the precious metal content in solders suitable for use in the production of jewellery made of precious metal alloys. 2 Normative references This European Standard inco
17、rporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this Eur
18、opean Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN IS0 1 121 O, Determination of platinum in platinum jewellery alloys - Gravimetric method affer precipitation of diammonium hexachloroplatinate.
19、EN IS0 1 1426, Determination of gold in gold jewellery alloys - Cuppelation method (fire assay). EN IS0 11489, Determination of platinum in platinum jewellery alloys - Gravimetric method affer reduction with mercury(/) chloride. EN IS0 11490, Determination of palladium in palladium jewellery alloys
20、- Gravimetric method with dimethyl- glyoxime. EN 31427, Detemination of silver in silver jewellery alloys - Volumetric (potentiometric) method using potassium bromide. prEN 3 1494, Detemination of platinum in platinum jewellery alloys - ICP-solution-spectrometric method using Yttrium as internal sta
21、ndard element. prEN 31 495, Determination of palladium in palladium jewellety alloys - ICP-solution-spectrometric method using Yttrium as internal standard element. Q BSI 11-2000 3 Definitions For the purpose of this standard, the following definitions apply. 3.1 assay analysis of precious metal by
22、a published standard procedure 3.2 fineness content of the named precious metal in the alloy in terms of parts per thousand by weight 3.3 jewellery products made of precious metal alloys with or without other materials, such as colliers, necklaces, bracelets, rings, etc. as well as associated produc
23、ts 3.4 precious metal platinum, gold, palladium and silver in the pure state and their alloys 3.5 precious metal alloy solid mixture of a precious metal with one or more other metals made by melting or an electrochemical technic 3.6 solder alloy used to join metal parts 4 Requirements with regard to
24、 fineness 4.1 article which will be soldered. For joining parts of gold jewellery solder shall be used which has at least the same fineness as the Exceptions to the above are: - gold alloy articles with a fineness of more than 75011 O00 shall be soldered with solder of a minimum fineness of 750/1 O0
25、0 gold; - gold chains made from wire with less than 1 mm diameter can be soldered with solder without gold contents. The solders shall not induce a decrease of the measured mean fineness below the declared fineness. 4.2 metals of 800/1 000. For joining parts of platinum jewellery solder shall be use
26、d with a minimum total content of precious Q BSI 11 -2000 I STD-BSI BS EN L904-ENGL 2000 m lb24bb9 0879b32 841 m Page 4 EN 1904:2000 4.3 metals of 700/1 000. For joining parts of palladium jewellery solder shall be used with a minimum total content of precious 4.4 For joining parts of silver jewelle
27、ry solder shall be used with a minimum fineness of 550/1 O00 silver. 5 Determination of fineness For the determination of the fineness the methods given in the referenced standards shall be used, if necessary in combination: EN IS0 11210, EN IS0 11426, EN IS0 11489, EN IS0 11490, EN 31427, prEN 3149
28、4, prEN 31495. Q BSI 11-2000 STD-BSI BS EN LSOY-ENGL 2000 W Lb24669 0877633 788 9 Page 5 EN 1904:2000 ANNEX ZB (informative) A-Dev ia t i o ns A-Deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CENICENELEC member. This Euro
29、pean Standard does not fall under any Directive of EC. In the relevant CENICENELEC countries these Adeviations are valid instead of the provisions of the European Standard until they have been removed. Notification of deviation from Austria legislation as contained in the DVO (Durchfhrungsverordung)
30、 concerning the marking law. Clause 4.1 and 4.2 Deviation asked from Austria “Annex : In 9 3 Abs. 3 DVO zum Punzierungsgesetz steht: Das Lot darf das zur Ltungnotwendige Mass nicht berschreiten und muss wenigstens die Hlfte des Feingehaltes des Platin-, Gold- oder Silbergegenstandes besitzen, zu des
31、sen Ltung es dient. Diese Bestimmung ist in den Punkten 4.1 und 4.2 des vorliegenden Normentwures prEN 1904 nicht erfllt.” Note - English translation made from the Secretariat: The filler metal shall not exceed the necessary mass for the soldering; the filler metal shall also have at least half of t
32、he fineness of the precious metal platinum or gold or silver alloy soldered Q BSI 11-2000 STD*BSI BS EN L904-ENGL ZOOU 111 LbZ4bb9 0879b34 bL4 Page 6 EN 1904:2000 Notification of deviation from UK legislation as contained in the Hallmarking Act 1973 as amended by Statutory Instruments 1976 No: 730,
33、1981 No. 559 and 1998 No. 2978. Clause 3.6 4 Deviation asked from U.K. Hallmarking Act 1973 (Chapter 43, Section 4 on Approved hallmarks) as amended by Statutory Instruments 1976 No. 730, , 1981 No. 559 and 1998 No. 2978. 4s defined in paragraph 3 (c), soldei is an alloy used to join metal parts and
34、 not for strencitheninci, weinhtinci, fillinci or otherwise. Hallmarking Act 1973 (Chapter 43, Section 4 on Approved hallmarks) as amended by Statutory Instruments 1976 No. 730,1981 No. 559 and 1998 No. 2978 Paragraph 3 (b) (i) states that in order for a gold article to be sold on the UK markets, th
35、e gol( solder used has to be of a fineness not less than the standard of fineness of the article. Exceptions to this are the following. - Item (a): for gold articles of standard of fineness of 916.6 or above, the gold solder has to be of a minimum fineness of 750. Item (b): in gold filigree work or
36、watchcases, either of a standard of fineness of 750, the gold solder has to be of a minimum fineness of 740. Item (c): in an article of white gold of a standard of fineness of not less than 585 and not more than 750, the gold solder has to be of a minimum fineness of 500. - - Paragraph 3 (b) (i) sta
37、tes that in order for a silver article of a standard of fineness of 925 to be sold on the UK markets, the silver solder has to be of a minimum fineness of 650. Daragraph 3 (b) (i) states that in order for a platinum article to be sold on the UK markets, the Aatinum solder (.e. gold, silver, platinum
38、 or palladium or a combination of two or more thereof) s of a fineness or, as the case may be, of a combined fineness not less than the standard neness of the article. aragraph 3 (c) states that solder of a fineness less than the standard of fineness of the article ir adhesive must be used in a quan
39、tity that is not less than is necessary for joining parts of the article, and must not be used for strengthening, weighting, filling or other purposes. Q BSI 11-2000 STD=BSI BS EN Lq04-ENGL 2000 = 3624667 0879635 550 W Page 7 EN 1904:2000 Bibliography l 2 EN 29202, Jewellery - Fineness of precious m
40、etal alloys. COM(93) 322 final - SYN 472, Proposal for a Council Directive on articles of precious metal. Q BSI i i -2000 BS EN 1904:2000 BSI 389 Chiswick High Road London w4 4AL STDmBSI BS EN 1704-ENGL 2000 m Lb24bb 0877b3b 497 m BSI - British Standards Institution BSI is the independent national b
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