1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23539-0 SANS 5433:2010Edition 1ISO 5433:1999Edition 1SOUTH AFRICAN NATIONAL STANDARD Leather Bovine wet blue Specification This national s
4、tandard is the identical implementation of ISO 5433:1999 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za
5、SABS SANS 5433:2010 Edition 1 ISO 5433:1999 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by SABS TC 120, Leather, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SAN
6、S document was published in January 2010. This SANS document supersedes SABS 1179:1977 (first edition, reprint 1990). AReference numberISO 5433:1999(E)INTERNATIONALSTANDARDISO5433First edition1999-03-01Leather Bovine wet blue SpecificationCuir Peaux de bovins ltat bleu humide SpcificationsSANS 5433:
7、2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 5433:1999(E) ISO 1999All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, incl
8、uding photocopying and microfilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 CH-1211 Genve 20 SwitzerlandInternet isoiso.chPrinted in SwitzerlandiiForewordISO (the International Organization for Standardization) is a worldwide feder
9、ation of national standards bodies (ISOmember bodies). The work of preparing International Standards is normally carried out through ISO technicalcommittees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee
10、. International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work. ISO collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization.Draft International Standards adopted by the technical
11、 committees are circulated to the member bodies for voting.Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.International Standard ISO 5433 was prepared by Technical Committee ISO/TC 120, Leather, Subcommittee SC 2,Tanned leather.Annex A
12、 forms an integral part of this International Standard. Annex B is for information only.SANS 5433:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO ISO 5433:1999(E)1Leather Bovine wet blue Specification1 ScopeThis
13、 International Standard specifies requirements, methods of sampling and methods of test for wet blue leatherproduced from bovine hides and parts of bovine hides tanned without hair and with the use of basic chromiumsulfate as the primary tanning agent.2 Normative referencesThe following standards co
14、ntain provisions which, through reference in this text, constitute provisions of thisInternational Standard. At the time of publication, the editions indicated were valid. All standards are subject torevision, and parties to agreements based on this International Standard are encouraged to investiga
15、te thepossibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintainregisters of currently valid International Standards.ISO 2418:1972, Leather Laboratory samples Location and identification.ISO 3380:1975, Leather Determination of shrinkage tempera
16、ture.ISO 4045:1975, Leather Determination of pH.3 DefinitionsFor the purposes of this International Standard, the following definitions apply.3.1curedpreserved temporarily from putrefaction until it can be tannedNOTE Any method of curing, including wet or dry salting or drying, is included.3.2pigmen
17、tationcolouration produced by fungi growing on wet blue chrome leatherNOTE The colouration produced by fungi will normally be black, white, green or yellow but can also be pink or violet.3.3bellythe part of the hide covering the underside and part of the legs of the animal3.4dossetdouble back the pa
18、rt of the hide remaining after the belly has been removed3.5shoulderthe fore part of the hide covering the shoulders and the neck of the animal, with or without the headSANS 5433:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 5433:19
19、99(E) ISO23.6buttthe part of the hide remaining after the belly and shoulder have been removed3.7sidehalf a whole hide with offal (head, shoulder and belly) attached, obtained by dividing it along the line of thebackbone3.8culattathe rear part of a bovine hide, comprising the butt, the belly middles
20、 and the hind shanks3.9frontthe fore part of a bovine hide, consisting of the shoulders and fore shanks4 Requirements4.1 Raw materialBovine wet blue leather shall be processed from cured or fresh hides or part hides.4.2 Form and trimming4.2.1 Bovine wet blue leather shall be in one or more of the fo
21、llowing forms, as specified by the purchaser:a) whole hides;b) bellies;c) dossets (double backs);d) shoulders;e) butts;f) sides;g) culattas;h) fronts.4.2.2 The trim shall be as agreed between supplier and purchaser.4.3 TanningAfter pretanning operations, bovine hides or part hides shall be tanned wi
22、th basic chromium sulfate as the primarytanning agent. The cut cross-section shall be such that the hide is completely penetrated by the bluish colour of thechromium sulfate when examined visually. Tanning shall be carried out at a pH of 3,0 or above.4.4 Fungicidal additivesFungicides shall be used
23、to inhibit mould growth in bovine wet blue leather.NOTE 1 The fungicides used to inhibit mould growth and pigmentation should be effective and should not cause a healthhazard. The types of fungicide used and their dosage should preferably be agreed between the purchaser and the supplier.SANS 5433:20
24、10This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . ISOISO 5433:1999(E)3NOTE 2 Fungicides should preferably be applied in quantities appropriate to ensure storage for up to 4 months at thetemperature and humidity prevailing during storage or t
25、ransportation. The effectiveness of the fungicidal treatment may bedetermined using one of the references given in annex B.4.5 PresentationBovine wet blue leather shall be well fleshed, and the grain side shall be free from hair, including short hair and finehair. The size and grading shall be as ag
26、reed between the interested parties.NOTE The wet blue leather should preferably have a tight grain and be free from creases, drum folds and stains caused byiron salts. At least 95 % of the number of pieces in a lot should be free from stains caused by chromium salts, and theaggregate of the stained
27、area in any one piece should not exceed 10 % of the total area of the piece.4.6 Shrinkage temperatureThe shrinkage temperature shall meet the requirement for either low chrome tannage or full chrome tannage givenin table 1, when determined using the method given in ISO 3380.Table 1 Shrinkage tempera
28、tureTannage Shrinkage temperatureLow chrome tannage minimum 85 CFull chrome tannage minimum 100 CNOTE Wet blue leather with a low chrome tannage (sometimes called a slack tannage) would be suitable for end useswhere, for example, there would be heavy rechroming or retannage.4.7 Chemical requirements
29、Bovine wet blue leather shall comply with the requirements given in table 2.Table 2 Chemical requirementsCharacteristic RequirementMoisture content, % (m/m) As agreed between theinterested partiespH of water extract (minimum) 3,5NOTE A minimum shrinkage temperature of 85 C would normally require a m
30、inimum chromic oxide content of 1,0 %relative to the dry mass, as determined by the method given in IUC 8, Determination of the chromic oxide content of leather.Similarly, a minimum shrinkage temperature of 100 C would require a minimum chromic oxide content of 3,5 %.5 Sampling5.1 Sampling for routi
31、ne testingThe number and location of laboratory samples taken for routine testing shall be as agreed between the interestedparties.5.2 Sampling in cases of disputeThe number of samples shall be as given in table 3 and the location shall be as specified in ISO 2418.SANS 5433:2010This s tandard may on
32、ly be used and printed by approved subscription and freemailing clients of the SABS .ISO 5433:1999(E) ISO4Table 3 Number of samples to be taken in cases of disputeNumber of hides orpiecesNumber of samplesup to 100 3101 to 300 4301 to 500 5501 to 700 6701 and over 75.3 Preparation of samplesPrepare s
33、amples by wiping off excess water and by keeping wrapped in filter paper for 30 min without applying anyextra pressure.6 Methods of test6.1 Visual testsExamine the bovine wet blue leather for uniformity of colour of the surface, penetration of chromium sulfate,absence of short hair and cleanness of
34、the flesh side.6.2 Shrinkage temperatureDetermine the shrinkage temperature by the method specified in ISO 3380.6.3 Moisture contentDetermine the moisture content by the method specified in annex A.6.4 pH of water extractDetermine the pH of a water extract by the method specified in ISO 4045.6.5 Eff
35、ectiveness of fungicideThe effectiveness of the fungicide used may be determined, if required, using one of the references given inannex B.7 Packaging and marking7.1 PackagingBovine wet blue leather shall be packaged suitably as agreed between the interested parties so as to preserve theiroriginal w
36、et condition.7.2 MarkingThe following particulars shall be marked on each package or on a label attached to the package:a) the type of material (i.e. bovine wet blue), and the trade name or brand name, if any;SANS 5433:2010This s tandard may only be used and printed by approved subscription and free
37、mailing clients of the SABS . ISOISO 5433:1999(E)5b) the name and address of the manufacturer;c) the month and year of tanning;d) the number of hides or pieces;e) any other details desired by the purchaser.SANS 5433:2010This s tandard may only be used and printed by approved subscription and freemai
38、ling clients of the SABS .ISO 5433:1999(E) ISO6Annex A(normative)Determination of moisture contentA.1 ApparatusA.1.1 Flat, shallow weighing vessels, with ground-glass stoppers, or shallow, open dishes.NOTE Small weighing vessels with ground-glass stoppers allow more accurate work than open dishes.A.
39、1.2 Oven, fitted with a fan and a regulator, capable of maintaining the temperature at 102 C 2 C.A.1.3 Suitable desiccator.A.1.4 Analytical balance.A.2 SamplingA.2.1 Sample in accordance with clause 5 of this International Standard.A.3 ProcedureA.3.1 Place a sample on a non-absorbent surface and cho
40、p manually into pieces not exceeding 5 mm square.A.3.2 Accurately weigh about 3 g of the sample to the nearest 1 mg into a tared weighing vessel (A.1.1) and dry at102 C 2 C for 5 h.A.3.3 Cool the vessel and contents for 30 min in the desiccator and reweigh.A.3.4 Repeat the drying, cooling and weighi
41、ng, but with a drying time of only 1 h, until either the further loss inmass does not exceed 3 mg (i.e. 0,1 % of the original mass) or the total drying time equals 8 h.A.3.5 Record the final mass of the weighing vessel and test portion, and calculate the mass of the dried testportion.A.4 Expression
42、of resultsA.4.1 CalculationCalculate the moisture content M, expressed as percentage by mass, using the following equation:M =mmm010100wherem0is the mass, in g, of the test portion before drying;m1is the mass, in g, of the test portion after drying.SANS 5433:2010This s tandard may only be used and p
43、rinted by approved subscription and freemailing clients of the SABS . ISOISO 5433:1999(E)7A.4.2 RepeatabilityThe results of duplicate determinations carried out by the same operator in the same laboratory should normally notdiffer by more than 0,5 % (m/m), calculated relative to the original mass of
44、 the test portion.A.5 Test reportThe test report shall include the following particulars:a) a reference to this International Standard;b) all details necessary for complete identification of the sample;c) the mean value of the results obtained, rounded to the first decimal place;d) details of any sp
45、ecial circumstances which may have affected the results.SANS 5433:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 5433:1999(E) ISO8Annex B(informative)Determination of effectiveness of fungicideThe following references give test metho
46、ds which have been used to assess the effectiveness of fungicides used onwet blue leather.Bugby, J. Soc. Leather Technol. Chem., 1987, 71, p. 138.Bienkiewicz, Oberman, Malik and Sokolowska, J. Soc. Leather Technol. Chem., 1982, 66, p. 129.Russell, Pinchuck and Cooper, J. Soc. Leather Technol. Chem.,
47、 1985, 69, p. 135.IEC 60068-2-10:1988, Environmental testing Part 2: Tests Section 10: Test J and guidance Mould growth.BS 2011:Part 2.1J:1989, Basic environmental testing procedures Part 2.1: Tests Test J and guidance Mould growth.ASTM D 4576-1986 (reapproved 1991), Standard test method for mold gr
48、owth resistance of blue stock (leather).NOTE This is not an exhaustive list of test methods. There may be some more test methods developed by other bodies onthe effectiveness of fungicides. SABSSANS 5433:2010This s tandard may only be used and printed by approved subscription and freemailing clients
49、 of the SABS .SABS Standards Division The objective of the SABS Standards Division is to develop, promote and maintain South African National Standards. This objective is incorporated in the Standards Act, 2008 (Act No. 8 of 2008). Amendments and Revisions South African National Standards are updated by amendment or revision. Users of South African National Standards should ensure that they possess the latest amendments or editions. The SABS continuously strives to improve the quality of it
