1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 20433:2012Leather Tests for colourfastness Colour fastness tocrocking (ISO 20433:2012)BS EN ISO 20433:2012 BRITISH STANDARDNational forewordThis British Standard is the
2、 UK implementation of EN ISO20433:2012. It supersedes BS ISO 20433:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can beobtained on request to its s
3、ecretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 75504 0ICS 59.140.30Compliance with a British Standard canno
4、t confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20433 October 2012 ICS 59.140
5、.30 English Version Leather - Tests for colour fastness - Colour fastness to crocking (ISO 20433:2012) Cuir - Essais de solidit des coloris - Solidit des coloris au dgorgement par frottement (ISO 20433:2012) Leder - Farbechtheitsprfungen - Farbechtheit gegen Reiben (ISO 20433:2012) This European Sta
6、ndard was approved by CEN on 30 September 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concern
7、ing such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into
8、its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Ger
9、many, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE F
10、R NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20433:2012: EBS EN ISO 20433:2012EN ISO 20433:2012 (E) 3 Foreword This document (EN ISO 20433:2012) has been pr
11、epared by Technical Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI, in collaboration with IULTCS “International Union of Leather Technologists and Chemists Societies“. This European Standard shall be given the status of a national standard, either by publication of an identic
12、al text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held respon
13、sible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finlan
14、d, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN ISO 20433:2012ISO 20433:2012
15、(E) IULTCS/IUF 452:2012(E) ISO 2012 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Principle . 1 4 Apparatus and materials. 2 5 Test specimens 2 6 Procedure . 2 7 Evaluation 2 8 Precision 3 9 Test report 3 Annex A (informative) Apparatus and materials 4 Bibliog
16、raphy 5 BS EN ISO 20433:2012ISO 20433:2012(E) IULTCS/IUF 452:2012(E) iv ISO 2012 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally
17、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 committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the wo
18、rk. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Inte
19、rnational Standards. Draft International Standards adopted by the technical 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. Attention is drawn to the possibility that some of t
20、he elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20433 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, in collaboration with the Fastness Te
21、sts Commission of the International Union of Leather Technologists and Chemists Societies (IUF Commission, IULTCS), in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). The first edition was based on IUF 452 published in J. Soc. Leather Tech. Chem., 86, p
22、p. 333-335, (2002), and declared an official method of the IULTCS in May 2003. This second edition of ISO 20433 cancels and replaces the first edition (ISO 20433:2005). This new version provides an update of the procedures, specifies the rubbing cloth (4.2) and includes precision information (Clause
23、 8). IULTCS, originally formed in 1897, is a worldwide organization of professional leather societies to further the advancement of leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for the sampling and testing of leather. ISO
24、recognizes IULTCS as an international standardizing body for the preparation of test methods for leather. BS EN ISO 20433:2012INTERNATIONAL STANDARD ISO 20433:2012(E)IULTCS/IUF 452:2012(E) ISO 2012 All rights reserved 1Leather Tests for colour fastness Colour fastness to crocking 1 Scope This Intern
25、ational Standard specifies a method for determining the amount of colour transferred from the surface of coloured leather to other surfaces by rubbing with a white cotton cloth. Two tests are carried out, one with a dry rubbing cloth and one with a wet rubbing cloth. The method is applicable to all
26、types of coloured leather. Since after treatments of the leather as well as surface finishes can affect the degree of colour transfer, the test can be made before and/or after such treatments. 2 Normative references The following referenced documents are indispensable for the application of this doc
27、ument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 105-A01, Textiles Tests for colour fastness Part A01: General principles of testing ISO 105-A03, Textiles Tests for colour fastne
28、ss Part A03: Grey scale for assessing staining ISO 105-A04, Textiles Tests for colour fastness Part A04: Method for the instrumental assessment of the degree of staining of adjacent fabrics ISO 105-F09, Textiles Tests for colour fastness Part F09: Specification for cotton rubbing cloth ISO 2418, Lea
29、ther Chemical, physical and mechanical and fastness tests Sampling location ISO 2419, Leather Physical and mechanical tests Sample preparation and conditioning 3 Principle Specimens of leather are rubbed with a dry or wet rubbing cloth attached to a cylindrical finger that is moved to and fro under
30、controlled conditions. Colour transferred to the white rubbing cloth is assessed with the grey scale for staining. The general colour fastness testing principles shall be in accordance with those described in ISO 105-A01, taking into account that the substrate is leather. BS EN ISO 20433:2012ISO 204
31、33:2012(E) IULTCS/IUF 452:2012(E) 2 ISO 2012 All rights reserved4 Apparatus and materials 4.1 Suitable test device, for determining the colour fastness to crocking. The device shall have a rubbing finger consisting of a cylinder of 16 mm 0,1 mm diameter which is driven to carry out a linear reciproc
32、ating motion along a 100 mm 5 mm track on the specimen, exerting a downward force of 9 0,2 N. NOTE An example of a suitable apparatus available commercially is given in Annex A. 4.2 White cotton rubbing cloth, desized, bleached, without finish, complying with ISO 105-F09. The cloth is cut into squar
33、es measuring approximately 50 mm 50 mm, for the rubbing finger in 4.1. NOTE An example of a suitable commercial source is given in Annex A. 4.3 Grey scale for assessing staining, complying with ISO 105-A03. 4.4 Spectrophotometer or colorimeter for assessing staining, complying with ISO 105-A04. 5 Te
34、st specimens If the piece of leather available for testing is a whole hide or skin, then first take a sample in accordance with ISO 2418. Two representative leather specimens, each measuring not less than 140 mm 50 mm, are required. One specimen is required for dry rubbing and the other for wet rubb
35、ing. Prior to testing, condition the specimens and dry rubbing cloth for at least 24 h under standard conditions in accordance with ISO 2419. 6 Procedure 6.1 Fasten each test specimen securely to the baseboard of the test device so that the surface to be tested is uppermost and the long direction of
36、 the specimen follows the track of the device. Test the specimen by the procedures in 6.2 and 6.3. 6.2 Dry rubbing: Fix the dry rubbing cloth (4.2) in place over the end of the cylindrical finger of the test device (4.1). At a rate of one turn per second, complete 10 turns of the crank to slide the
37、rubbing finger to and fro (10 times to and 10 times fro) in a straight line along a track 100 mm long on a dry specimen, exerting a downward force of 9 N. After rubbing, remove the cloth. 6.3 Wet rubbing: Establish a technique for preparing a wet rubbing cloth by weighing a conditioned piece of clot
38、h, thoroughly wetting it out in distilled water, squeezing or wringing it, then reweighing it until the water pick-up is 100 % 5 %. Follow the directions for rubbing given in 6.2 with a fresh leather specimen. After rubbing, remove the cloth and dry it at room temperature. 7 Evaluation Remove dust a
39、nd fibrous matter retained on the surface of both cotton rubbing cloths by light brushing or by careful use of the sticky side of clear adhesive tape. Consider only the coloration due to staining by the dye. Back each of the rubbing cloths used in the test with three layers of unused white rubbing c
40、loth and, under suitable illumination, according to ISO 105-A01, visually assess the staining of the rubbing cloths using the grey scale for staining in accordance with ISO 105-A03 (4.3). BS EN ISO 20433:2012ISO 20433:2012(E) IULTCS/IUF 452:2012(E) ISO 2012 All rights reserved 3Alternatively, provid
41、ed the staining on the rubbing cloth is even, the grey scale colour difference can be assessed instrumentally (4.4) in accordance with ISO 105-A04. 8 Precision For the visual grey scale evaluations, an inter-person precision of 0,5 grey scale units is normal. 9 Test report The test report shall incl
42、ude the following information: a) a reference to this International Standard; b) a description of the type of leather tested; c) the numerical grey scale ratings obtained for the staining of the dry rubbing cloth and the wet rubbing cloth; d) details of any deviations from the procedure specified; e
43、) the date of the test. BS EN ISO 20433:2012ISO 20433:2012(E) IULTCS/IUF 452:2012(E) 4 ISO 2012 All rights reservedAnnex A (informative) Apparatus and materials Examples of suitable products available commercially are given below. This information is given for the convenience of users of this Intern
44、ational Standard and does not constitute an endorsement by ISO of these products. A.1 Crockmeter A suitable test apparatus (4.1), the AATCC Crockmeter, is described in the Technical Manual of the American Association of Textile Chemists and Colorists, Test Method 8-2007. A Crockmeter can be obtained
45、, for example, from James H. Heal & Co. Ltd, Richmond Works, Halifax, West Yorkshire HX3 6EP, England. Website: www.james-heal.co.uk PFI Germany, Test and Research Institute, Marie-Curie-Strasse 19, D-66953 Pirmasens, Germany. Website: www.pfi-germany.de Other crocking devices can be used, provided
46、that the same results are obtained as with the apparatus described in 4.1. A.2 Rubbing cloth A suitable white cotton rubbing cloth (4.2) can be obtained, for example, from: EMPA Testmaterialien AG, Mvenstrasse 12, CH-9015 St. Gallen-Winkeln, Switzerland. Website: www.empa-testmaterials.ch. SDC Enter
47、prises Limited, Pitcliffe Way, Upper Castle Street, Bradford, BD5 7SG, UK. Website: www.sdcenterprises.co.uk A.3 Abnormal crock images If the crocking apparatus is not correctly maintained, circular images of the rubbing finger outer edges can be obtained. Details on possible causes and corrective a
48、ctions are contained in AATCC Test Method 8-2007. BS EN ISO 20433:2012ISO 20433:2012(E) IULTCS/IUF 452:2012(E) ISO 2012 All rights reserved 5Bibliography Other, related, test methods: 1 ISO 105-X12, Textiles Tests for colour fastness Part X12: Colour fastness to rubbing 2 AATCC Test Method 8-2007, C
49、olorfastness to Crocking: AATCC Crockmeter Method 3 ASTM D 5053, Standard Test Method for Colorfastness of Crocking of Leather 4 ISO 11640, Leather Tests for colour fastness Colour fastness to cycles of to-and-fro rubbing This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services. It presents the UK view on standards in Europe a
