1、BRITISH STANDARD BS ISO 10713:1992 Jewellery Gold alloy coatings ICS 39.060BS ISO 10713:1992 This British Standard, having been prepared under the directionof the Sector Board for Materials and Chemicals, was published under the authority of the Standards Boardand comes into effect on 15 April 1997
2、BSI 11-1998 ISBN 0 580 27288 5 National foreword This British Standard has been prepared by Technical Committee STI/53, Jewellery. It is identical with ISO10713:1992 Jewellery Gold alloy coatings published by the International Organization for Standardization (ISO). The UK participated actively in t
3、he preparation of ISO10713:1992 which was undertaken by ISO/TC174. A list of organizations represented on this committee can be obtained on request. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Stan
4、dards Catalogue under the section entitled “International Standards Correspondence Index”, or 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 Standards are responsible for
5、 their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 and 2 and a back cover. This standard has been updated
6、(see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO10713:1992 ii BSI 11-1998 Contents Page National foreword Inside front cover Foreword iii 1 Scope 1 2
7、Normative references 1 3 Coating thickness requirements and relevant terms 1 4 Measurement of coating thickness 1 5 Marking 1 Table 1 Terms, manufacturing process and coating requirements 2BSISO10713:1992 BSI 11-1998 iii Foreword ISO (the International Organization for Standardization) is a worldwid
8、e 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
9、 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
10、the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO10713 was prepared by Technical Committee ISO/TC174, Jewellery. Descriptors: Jewellery, go
11、ld alloys, coatings, specifications, fineness, thickness, thickness measurement, marking.iv blankBS ISO 10713:1992 BSI 11-1998 1 1 Scope This International Standard specifies the coating thickness requirements and the gold fineness of the coating. It also defines current terms concerning gold alloy
12、coatings. It is not applicable to watch bracelets if they are permanently attached to the case. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indi
13、cated were valid. All standards are subject to revision, and parties to agreements based on this International Standard 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 In
14、ternational Standards. ISO 3160-2:1982, Watch cases and accessories Gold alloy coverings Part 2: Determination of fineness, thickness and corrosion resistance. ISO 3497:1990, Metallic coatings Measurement of coating thickness X-ray spectrometric methods. ISO 3543:1981, Metallic and non-metallic coat
15、ings Measurement of thickness Beta backscatter method. ISO 9220:1988, Metallic coatings Measurement of coating thickness Scanning electron microscope method. 3 Coating thickness requirements and relevant terms Jewellery with a gold alloy coating may be designated by the terms given in Table 1 only i
16、f the thickness of the coating is in accordance with the values indicated in this table. NOTE 1This coating requirement may also be defined by the fine gold content related to the total mass of the article. The fine gold content defined in this way is customarily indicated in the jewellery trade in
17、“millime”. In this case, the conformity of the coating with the requirements has to be calculated using the mass of the article, the value expressed in millime, the surface area and the density of fine gold. However, to conform with this International Standard, the coating, defined in millime, has t
18、o be at least equivalent to the thickness indicated in Table 1. 4 Measurement of coating thickness The thickness measurement is not related to any particular part of a plated article, but to the overall quantity of fine gold necessary to produce the required thickness over the total surface area of
19、the article. 4.1 Basic method (destructive method) For arbitration, the dissolution method and chemical analysis shall be used. The average thickness has to be calculated using the fine gold content, the density of fine gold and the surface area. For details of the dissolution method and chemical an
20、alysis see ISO 3160-2. 4.2 Secondary methods (non-destructive methods) On agreement between the manufacturer and purchaser, the following methods may be used: a) beta backscatter method according to ISO3543; b) X-ray spectrometric method according to ISO3497; c) scanning electron microscope method a
21、ccording to ISO 9220. NOTE 2These non-destructive methods are recommended for manufacturing control and continuous quality control. However, only local thicknesses can be determined. Therefore, the number of measurements and the position of the measurement points have to be agreed upon by the manufa
22、cturer and purchaser. Other test methods may be used, if it can be demonstrated that they are as good as, or better than, the methods described in this International Standard. 5 Marking 5.1 Articles in accordance with the requirements and designated by the terms given inTable 1 may be marked as The
23、relevant category, according to the letter given in Table 1 may be added. EXAMPLE P B: for coatings with a minimum thickness of3 m, applied by a galvanic process, with a fineness of at least 585/1000. 5.2 If there is any marking on the article, it shall comprise the makers mark or the mark of respon
24、sibility. 5.3 It is not permitted to mark or stamp articles which are only gilt. 5.4 The fine gold content or the values in parts per thousand of any coating may not be marked on any article. L: for coatings applied by a mechanical process; P: for coatings applied by any other process.BS ISO 10713:1
25、992 2 BSI 11-1998 Table 1 Terms, manufacturing process and coating requirements Terms Manufacturing process Category Coating Thickness (min.) Fineness English French German Fine gold a Gold alloy min. Rolled gold Plaqu or (lamin) Golddoubl Mechanical A 5 m min. 375/1000 Doubl or (lamin) Walzgolddoub
26、l B 3 m min. C 0,5 m min. a Gold plated Plaqu or Golddoubl A 5 m min. 585/1 000 Doubl or Goldplattiert Any other B 3 m min. C 0,5 m min. a Gilt Dor Vergoldet Any other 0,5 m 585/1 000 a The quality of this coating is defined in fine gold, even though the coating consists of gold alloy. Therefore, th
27、e actual thickness of the applied gold alloy coating will vary according to the alloy used as follows: Gold alloy375/1000 =2,3 m Gold alloy417/1000 =1,9 m Gold alloy585/1000 =1,2 m Gold alloy667/1000 =1,0 m Gold alloy750/1000 =0,835 m Gold alloy 1000/1000 =0,5 m The actual thicknesses of the gold al
28、loy coatings indicated above correspond to a thickness of0,5m of fine gold. NOTEThe values of category C, referring to fine gold, are supplied directly by the test method recommended in4.2.blankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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