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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 15893 (2011): Jewellery - Alloy Coatings [MTD 10: Precious Metals] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 15893 : 2010 ISO 10713 : 1992 Hkkjrh; ekud vkHkw"k.k Lo.kZ feJ/kkrq ysiu — Indian Standard JEWELLERY — GOLD ALLOY COATINGS ICS 39.060 © BIS 2010 BU R E AU O F I N D I A N S TA N DA R D S MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 October 2010 Price Group 2 Precious Metals Sectional Committee, MTD 10 NATIONAL FOREWORD This Indian Standard which is identical with ISO 10713 : 1992 ‘Jewellery — Gold alloy coatings’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Precious Metals Sectional Committee and approval of the Metallurgical Engineering Division Council. The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following: a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’. b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker. In this adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards which are to be substituted in their respective places are listed below along with their degree of equivalence for the editions indicated: International Standard Corresponding Indian Standard Degree of Equivalence ISO 3160-2 : 1982 Watch cases and IS 12114 (Part 2) : 1987 Specification Technically Equivalent accessories — Gold alloy coverings for gold alloy coverings on watch cases — Part 2: Determination of fineness, and their accessories: Part 2 thickness and corrosion resistance Determination of fineness, thickness and corrosion resistance ISO 3497 : 1990 Metallic coatings — IS 12860 : 1989 Metallic coating do Measurement of coating thickness — thickness by X-ray fluorescence X-ray spectrometric methods technique method — Determination ISO 3543 : 1981 Metallic and non- IS 14149 : 1994 Metallic and non- Identical metallic coatings — Measurement of metallic coatings — Measurement of thickness — Beta backscatter method thickness — Beta backscatter method The technical committee has reviewed the provisions of the following International Standard referred in this adopted standard and has decided that it is acceptable for use in conjunction with this standard: International Standard Title ISO 9220 : 1988 Metallic coatings — Measurement of coating thickness — Scanning electron microscope method For the purpose of deciding whether a particular requirement of this standard is complied with the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. INTERNATIONAL STANDARD IS 15893 : 2010 ISO 10713 : 1992 Indian Standard JEWELLERY — GOLD ALLOY COATINGS Jewellery 1 Scope NOTE 1 This 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 custom- This International Standard specifies the coating arily indicated in the jewellery trade in “millieme”. In this thickness requirements and the gold fineness of the case, the conformity of the coating with the requirements coating. It also defines current terms concerning gold has to be calculated using the mass of the article, the value alloy coatings. expressed in millieme, the surface area and the density of fine gold. However, to conform with this International It is not applicable to watch bracelets if they are per- Standard, the coating, defined in millieme, has to be at least manently attached to the case. equivalent to the thickness indicated in table 1. 2 Normative references 4 Measurement of coating thickness The following standards contain provisions which, The thickness measurement is not related to any through reference in this text, constitute provisions particular part of a plated article, but to the overall of this International Standard. At the time of publica- quantity of fine gold necessary to produce the re- tion, the editions indicated were valid. All standards quired thickness over the total surface area of the ar- are subject to revision, and parties to agreements ticle. based on this International Standard are encouraged to investigate the possibility of applying the most re- 4.1 Basic method (destructive method) cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- For arbitration, the dissolution method and chemical rently valid International Standards. analysis shall be used. The average thickness has to be calculated using the fine gold content, the density IS0 3160-2:1982, Watch cases and accessories - of fine gold and the surface area. Gold alloy coverings - Part 2: Determination of fineness, thickness and corrosion resistance. For details of the dissolution method and chemical analysis see IS0 3160-2. IS0 3497: 1990, Metallic coatings - Measurement of coating thickness - X-ray spectrometric methods. 4.2 Secondary methods (non-destructive methods) IS0 3543:1981, Metallic and non-metallic coatings - Measurement of thickness - Beta backscatter On agreement between the manufacturer and pur- method. chaser, the following methods may be used: IS0 9220:1988, Metallic coatings - Measurement of a) beta backscatter method according to IS0 3543; coating thickness - Scanning electron microscope method. b) X-ray spectrometric method according to IS0 3497; 3 Coating thickness requirements and c) scanning electron microscope method according relevant terms to IS0 9220. Jewellery with a gold alloy coating may be designated NOTE 2 These non-destructive methods are recom- by the terms given in table 1 only if the thickness of mended for manufacturing control and continuous quality the coating is in accordance with the values indicated control. However, only local thicknesses can be determined. in this table. Therefore, the number of measurements and the position IS 15893 : 2010 ISO 10713 : 1992 of the measuremen points have to be agreed upon by the EXAMPLE manufacturer and purchaser. P - B: for coatings with a minimum thickness of Other test methods may be used, if it can be dem- 3 pm, applied by a galvanic process, with a onstrated that they are as good as, or better than, the fineness of at least 585/l 000. methods described in this International Standard. 5 Marking 5.2 If there is any marking on the article, it shall comprise the maker’s mark or the mark of responsi- bi lity. 5.1 Articles in accordance with the requirements and designated by the terms given in table 1 may be marked as 5.3 It is not permitted to mark or stamp articles . which are only gilt. L . for coatings applied by a mechanical process; P: for coatings applied by any other process. 5.4 The fine gold content or the values in parts per The relevant category, according to the letter given in thousand of any coating may not be marked on any table 1 may be added. article. IS 15893 : 2010 d Fineness min. 375/I 000 1) 585/l 000 1) 585/I 000 applied gol e 1 9 th of alloy min. min. min. min. ess min.) Gold 5 pm 3 pm 5 pm 3 pm thickn oating ess ( actual n 4.2. C Thickn Fine gold’) 0,5 pm min. 0,5 pm min. < 0,5 pm erefore, the of fine gold. mmended i Th m co alloy. 0,5 p od re Category A B C A B C of gold ness of est meth nsists a thick y the t co o b t nufacturing process Mechanical Any other Any other he coating orrespond ed directly Ma t c pli ugh ove sup Terms French German English Plaque or (Iamine) Golddouble Rolled gold Double or (lamine) Walzgolddouble Golddouble Gold plated Plaque or Goldplattiert Double or Dot-e Vergoldet Gilt 1) The quality of this coating is defined in fine gold, even thoalloy coating will vary according to the alloy used as follows: Gold alloy 375/I 000 = 2,3 pm Gold alloy 417/I 000 = I,9 pm Gold alloy 585/l 000 = I,2 pm Gold alloy 667/I 000 = I,0 pm Gold alloy 750/I 000 = 0,835 pm Gold alloy 1 000/l 000 = 0,5 pm The actual thicknesses of the gold alloy coatings indicated ab - The values of category C, referring to fine gold, are NOTE 3 Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. 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This Indian Standard has been developed from Doc No.: MTD 10 (4887). Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telephones: 2323 0131, 2323 3375, 2323 9402 Website: www.bis.org.in Regional Offices: Telephones Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg 2323 7617 NEW DELHI 110002 2323 3841 Eastern : 1/14 C.I.T. Scheme VII M, V.I.P. Road, Kankurgachi 2337 8499, 2337 8561 KOLKATA 700054 2337 8626, 2337 9120 Northern : SCO 335-336, Sector 34-A, CHANDIGARH 160022 260 3843 260 9285 Southern : C.I.T. Campus, IV Cross Road, CHENNAI 600113 2254 1216, 2254 1442 2254 2519, 2254 2315 Western : Manakalaya, E9 MIDC, Marol, Andheri (East) 2832 9295, 2832 7858 MUMBAI 400093 2832 7891, 2832 7892 Branches : AHMEDABAD. BANGALORE. B HOPAL. BHUBANESHWAR. COIMBATORE. DEHRADUN. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR. PARWANOO. PATNA. 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