1、BSI Standards PublicationBS ISO 5432:2013Leather Wet blue sheepskins SpecificationBS ISO 5432:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 5432:2013.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/69, Footwear, leather an
2、d coated fabrics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Publishe
3、d by BSI StandardsLimited 2013ISBN 978 0 580 80573 8ICS 59.140.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2013.Amendments issued since publication
4、Date Text affectedBS ISO 5432:2013 ISO 2013Leather Wet blue sheep skins SpecificationCuir Peaux dovins ltat “bleu humide” SpcificationsINTERNATIONAL STANDARDISO5432Second edition2013-08-01Reference numberISO 5432:2013(E)BS ISO 5432:2013ISO 5432:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECT
5、ED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, 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. Permiss
6、ion can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 5432:2013ISO 5432:2013(E)
7、 ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normativereferences 13 Termsanddefinitions . 14 Requirements 14.1 Raw material . 14.2 Tanning 14.3 Fungicidal additives 24.4 Presentation 24.5 Shrinkage temperature 24.6 Chemical requirements 25 Sampling 25.1 Sampling for routine
8、testing 25.2 Sampling in case of dispute 25.3 Preparation of samples 36 Methodoftest 36.1 Visual tests 36.2 Shrinkage temperature 36.3 Volatile matter . 36.4 pH of the water extract 36.5 Effectiveness of the fungicide . 37 Packingandmarking . 37.1 Packing . 37.2 Marking . 3BS ISO 5432:2013ISO 5432:2
9、013(E)ForewordISO (the International Organization for Standardization) is a worldwide 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 whic
10、h a technical committee has been established has the right to be represented on that 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 ma
11、tters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This d
12、ocument was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such
13、patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not con
14、stitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword - Supplementary informationThe
15、committee responsible for this document is ISO/TC 120, Leather, Subcommittee SC 2, Tanned leather.This second edition cancels and replaces the first edition (ISO 5432:1999), which has been technically revised.iv ISO 2013 All rights reservedBS ISO 5432:2013INTERNATIONAL STANDARD ISO 5432:2013(E)Leath
16、er Wetbluesheepskins Specification1 ScopeThis International Standard specifies requirements, methods of sampling and methods of test for wet blue leather produced from sheep skins tanned without wool and with the use of basic chromium sulfate as the primary tanning agent.2 NormativereferencesThe fol
17、lowing documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2418, Leath
18、er Chemical, physical and mechanical and fastness tests Sampling locationISO 3380, Leather Physical and mechanical tests Determination of shrinkage temperature up to 100 CISO 4045, Leather Chemical tests Determination of pHISO 4684, Leather Chemical tests Determination of volatile matterISO 5398-1,
19、Leather Chemical determination of chromic oxide content Part 1: Quantification by titrationASTM D4576, Standard test method for mold growth resistance of wet blue3 TermsanddefinitionsFor the purposes of this document, the following terms and definitions apply.3.1curedpreserved temporarily from putre
20、faction until it can be tannedNote 1 to entry: Any method of curing, including wet or dry salting or drying, is included3.2pigmentationcolouration produced by fungi growing on wet blue chrome leatherNote 1 to entry: The colouration produced by fungi will normally be black, white, green or yellow but
21、 can also be pink or violet.4 Requirements4.1 RawmaterialWet blue sheep skins shall be processed from cured or fresh sheep skins.4.2 TanningAfter pretanning operations, the skins shall be tanned with basic chromium sulfate as the primary tanning agent. The cut cross-section shall be such that the sk
22、in is completely penetrated by the bluish colour of the chromium sulfate when examined visually. Tanning shall be completed at a pH of 3,0 or above. ISO 2013 All rights reserved 1BS ISO 5432:2013ISO 5432:2013(E)4.3 FungicidaladditivesFungicides shall be used to inhibit mould growths in the wet blue
23、sheep skins.NOTE 1 Fungicides used to inhibit mould growth and pigmentation in wet blue sheep skins should be effective and should not cause a health hazard. The types of fungicide used and their dosage should be as agreed upon between the purchaser and the supplierNOTE 2 Fungicides should preferabl
24、y be applied in quantities appropriate to ensure storage for up to 4 months at the temperature and humidity prevailing during storage or transportation.4.4 PresentationWet blue sheep skins shall have clean flesh side and the grain side shall be free from wool. The size and grading shall be as agreed
25、 between the interested parties.NOTE Wet blue sheep skins should have a tight grain and be free from creases, drum folds and stains caused by iron salts. Atleast 95 % of the number of pieces in a lot should be free from stains caused by chromium salts, and the aggregate of the stained area in any on
26、e piece should not exceed 10 % of the total area of the piece.4.5 ShrinkagetemperatureThe shrinkage temperature shall not be less than 95 C, when determined using the method specified in ISO 3380.4.6 ChemicalrequirementsWet blue sheep skins shall comply with the requirements given in Table 1.Table1
27、ChemicalrequirementsCharacteristic RequirementVolatile matter, % As agreed between the interested partiespH of water extract (minimum) 3,5NOTE A minimum shrinkage temperature of 95 C would normally require minimum chromic oxide content of 3,0 % relative to the dry mass, as determined by the method g
28、iven by ISO 5398-1. Once the chromic oxide content has been determined in this way, it can be used to estimate how much more chromic oxide has to be added to achieve the desired level (i.e. the extent of further rechroming).5 Sampling5.1 SamplingforroutinetestingThe number and location of samples ta
29、ken for routine testing shall be as agreed between the interested parties.5.2 SamplingincaseofdisputeThe number of samples shall be as given in Table 2 and the location shall be as specified in ISO 2418.2 ISO 2013 All rights reservedBS ISO 5432:2013ISO 5432:2013(E)Table2 Numberofsamplestobetakeninca
30、sesofdisputeNumberofskins NumberofsamplesUp to 100 3101 to 300 4301 to 500 5501 to 700 6701 and over 75.3 PreparationofsamplesPrepare samples by wiping off excess water and keeping wrapped in filter paper for 30 min without applying any extra pressure.6 Methodoftest6.1 Visual testsExamine the wet bl
31、ue sheep skins for uniformity of colour of the surface, penetration of chromium sulfate, absence of wool and cleanness of the flesh side.6.2 ShrinkagetemperatureDetermine the shrinkage temperature by the method specified in ISO 3380.6.3 VolatilematterDetermine the volatile matter by the method speci
32、fied in ISO 4684.6.4 pHofthewaterextractDetermine the pH of the water extract by the method specified in ISO 4045.6.5 EffectivenessofthefungicideDetermine the effectiveness of the fungicide by the method specified in ASTM D4576.7 Packingandmarking7.1 PackingWet blue sheep skins shall be packed suita
33、bly as agreed between the interested parties so as to preserve their original wet condition.7.2 MarkingThe following particulars shall be marked or labelled on each package:a) name of the material, and the trade name or brand name, if any;b) name and address of the manufacturer;c) month and year of
34、the tanning; ISO 2013 All rights reserved 3BS ISO 5432:2013ISO 5432:2013(E)d) number of pieces of skins;e) other details desired by the purchaser.4 ISO 2013 All rights reservedBS ISO 5432:2013BS ISO 5432:2013ISO 5432:2013(E) ISO 2013 All rights reservedICS 59.140.30Price based on 4 pagesThis page de
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