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1、BRITISH STANDARD BS ISO 20433:2005 Leather Tests for colour fastness Colour fastness to crocking ICS 59.140.30 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 20433:2005 This British Standard was published under the authority of the
2、 Standards Policy and Strategy Committee on 12 January 2006 BSI 12 January 2006 ISBN 0 580 47050 4 National foreword This British Standard reproduces verbatim ISO 20433:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee TC
3、I/69, Footwear and leather, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catal
4、ogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its cor
5、rect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests inform
6、ed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 5 and a back cover. The BSI copyright notice displayed in this docu
7、ment indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 20433:2005(E) IULTCS/IUF 452:2005(E) INTERNATIONAL STANDARD ISO
8、20433 IULTCS/IUF 452 First edition 2005-07-15 Leather Tests for colour fastness Colour fastness to crocking Cuir Essais de solidit des teintures Solidit des teintures au frottement avec abrasion BS ISO 20433:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontr
9、olled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
10、ternational 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 committee. International organizations, governmental and non-governmental, in liaison
11、with ISO, also take part in the work. 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 techn
12、ical committees is to prepare International 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
13、 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 patent rights. ISO 20433 was prepared by the Fastness Tests Commission of the International Union of Leather Technologists and Chemist
14、s Societies (IUF Commission, IULTCS). It is based on IUF 452 published in J. Soc. Leather Tech. Chem., 86, pp. 333-335, 2002, and declared an official method of the IULTCS in May 2003. IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to further the ad
15、vancement of leather science and technology. IULTCS has three Commissions, which are responsible for establishing international methods for the sampling and testing of leather. ISO recognizes IULTCS as an international standardizing body for the preparation of test methods for leather. BS ISO 20433:
16、2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Leather Tests for colour fastness Colour fastness to crocking 1 Scope Thi
17、s International Standard specifies a method for determining the amount of colour transferred from the surface of coloured leather to other surfaces by rubbing. Two tests are carried out, one with a dry rubbing cloth and one with a wet rubbing cloth. The method is applicable to all types of coloured
18、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 treatment. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated re
19、ferences, 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 fastness Part A03: Grey s
20、cale 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 2418, Leather Chemical, physical and mechanical and fastness tests Sampling location ISO 2419, Leather Physical and mechanica
21、l 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 controlled conditions. Colour transferred to the white rubbing cloth is assessed with the grey scale for staining. T
22、he general colour fastness testing principles shall be in accordance with those described in ISO 105-A01, taking into account that the substrate is leather. 4 Apparatus and materials 4.1 Suitable test device, for determining the colour fastness to crocking. The device shall have a rubbing finger con
23、sisting of a cylinder of 16 mm diameter which is driven to carry out a linear reciprocating motion along a 100 mm 5 mm track on the specimen, exerting a downward force of 9 N. NOTE An example of a suitable apparatus available commercially is given in Annex A. BS ISO 20433:2005 Licensed Copy: sheffie
24、ldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 4.2 White cotton rubbing cloth, desized, bleached, without finish, cut into squares measuring approximately 50 mm 50 mm, for the finger used in 4.1. NOTE An example of a suitable commercial source is given in Anne
25、x A. 4.3 Grey scale for assessing staining, complying with ISO 105-A03. 5 Test 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 r
26、equired. One specimen is required for dry rubbing and the other for wet rubbing. 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 de
27、vice so that the surface to be tested is uppermost and the long direction of 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
28、 a rate of one turn per second, complete 10 turns of the crank to slide the 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 techniq
29、ue for preparing a wet rubbing cloth by weighing a conditioned piece of cloth, thoroughly wetting it out in distilled water and squeezing or wringing it until the water pick-up is approximately 100 %. Follow the directions for rubbing given in 6.2 with a fresh leather specimen. After rubbing, remove
30、 the cloth and dry it at room temperature. 7 Evaluation Remove dust and 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 rubbin
31、g cloths used in the test with three layers of unused white rubbing cloth and, under suitable illumination, visually assess the staining of the rubbing cloths using the grey scale for staining in accordance with ISO 105-A03 (4.3). Alternatively, provided the staining on the rubbing cloth is even, th
32、e grey scale colour difference can be assessed instrumentally in accordance with ISO 105-A04. BS ISO 20433:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 8 Test report The test report shall include the following information: a) a ref
33、erence 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) the date of the test. BS ISO 20433:20
34、05 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 Annex A (informative) Apparatus and materials A.1 Crockmeter A suitable apparatus, the AATCC Crockmeter, is described in the Technical Manual of the American Association of Textile Chemist
35、s and Colorists, Test Method 8-1989. A Crockmeter can be obtained, for example, from James H. Heal & Co. Ltd, Richmond Works, Halifax, West Yorkshire HX3 6EP, England. Other crocking devices can be used, provided that the same results are obtained as with the apparatus described in 4.1. A.2 Rubbing
36、cloth The white cotton rubbing cloth can be obtained, for example, from EMPA Testmaterials, Mvenstrasse 12, CH-9015 St. Gallen-Winkeln, Switzerland. A.3 Abnormal crock images If the crocking apparatus is not correctly maintained, poor, circular images of the rubbing finger can be obtained. Details o
37、n possible causes and corrective actions are contained in AATCC Test Method 8-1989. BS ISO 20433:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 Bibliography Other, related, test methods: 1 ISO 105-X12, Textiles Tests for colour fastn
38、ess Part X12: Colour fastness to rubbing 2 AATCC Test Method 8-1989, Colorfastness 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 BS ISO 2
39、0433:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 02:17:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 20433:2005 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It prese
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