1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationLeather Tests for colour fastness Colour fastness to perspirationBS EN ISO 11641:2012National forewordThis British Standard is the UK implementation of EN ISO 11641:2012. Itsuper
2、sedes BS EN ISO 11641:2003 which is withdrawn.The UK participation in its preparation was entrusted to Technical CommitteeTCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to
3、 include all the necessary provisions of acontract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 72959 1ICS 59.140.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This
4、British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 December 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN ISO 11641:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11641 November 2012 ICS 59.1
5、40.30 Supersedes EN ISO 11641:2003English Version Leather - Tests for colour fastness - Colour fastness to perspiration (ISO 11641:2012) Cuir - Essais de solidit des coloris - Solidit des coloris la sueur (ISO 11641:2012) Leder - Farbechtheitsprfungen - Farbechtheit gegen Schwei (ISO 11641:2012) Thi
6、s European Standard was approved by CEN on 14 November 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 refer
7、ences concerning 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
8、 member into 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
9、, France, Germany, 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 EUROPISC
10、HES KOMITEE FR 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 11641:2012: EBS EN ISO 11641:2012EN ISO 11641:2012 (E) 2 Contents Page Foreword 3BS EN ISO 11641:2
11、012EN ISO 11641:2012 (E) 3 Foreword This document (EN ISO 11641:2012) has been prepared by Technical Committee CEN/TC 289 “Leather“, the secretariat of which is held by UNI, in collaboration with the International Union of Leather Technologists and Chemists Societies. This European Standard shall be
12、 given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2013, and conflicting national standards shall be withdrawn at the latest by May 2013. Attention is drawn to the possibility that some of the elements of this document may be
13、the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 11641:2003. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to im
14、plement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
15、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 11641:2012 has been approved by CEN as a EN ISO 11641:2012 without any modification. BS EN ISO 11641:2012ISO 11641:2012(E) IULTCS/IUF 426:2012(E) ISO 2012 All rights reserved iiiCont
16、ents Page 1 Scope 1 2 Normative references 1 3 Principle . 2 4 Apparatus and materials. 2 5 Test specimens 4 6 Procedure . 4 7 Evaluation 5 8 Precision 5 9 Test report 5 Annex A (informative) Commercial sources for apparatus and materials 6 Bibliography 7 BS EN ISO 11641:2012INTERNATIONAL STANDARD I
17、SO 11641:2012(E)IULTCS/IUF 426:2012(E) ISO 2012 All rights reserved 1Leather Tests for colour fastness Colour fastness to perspiration 1 Scope This International Standard specifies a method for determining the colour fastness to perspiration of leather of all kinds at all stages of processing. It ap
18、plies particularly to gloving, clothing and lining leathers, as well as leather for the uppers of unlined shoes. The method uses an artificial perspiration solution to simulate the action of human perspiration. Since perspiration varies widely from one individual to the next, it is not possible to d
19、esign a method with universal validity, but the alkaline artificial perspiration solution specified in this International Standard will give results corresponding to those with natural perspiration in most cases. NOTE In general, human perspiration is weakly acidic when freshly produced. Micro-organ
20、isms then cause it to change, the pH usually becoming weakly alkaline (pH 7,5 to 8,5). Alkaline perspiration has a considerably greater effect on the colour of leather than has acid perspiration. Therefore, for coloured leather, an alkaline perspiration solution is used to simulate the most demandin
21、g conditions encountered in practice. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment
22、s) applies. ISO 105-A01, Textiles Tests for colour fastness Part A01: General principles of testing ISO 105-A02, Textiles Tests for colour fastness Part A02: Grey scale for assessing change in colour ISO 105-A03, Textiles Tests for colour fastness Part A03: Grey scale for assessing staining ISO 105-
23、A04, Textiles Tests for colour fastness Part A04: Method for the instrumental assessment of the degree of staining of adjacent fabrics ISO 105-A05, Textiles Tests for colour fastness Part A05: Instrumental assessment of change in colour for determination of grey scale rating ISO 105-E04, Textiles Te
24、sts for colour fastness Part E04: Colour fastness to perspiration ISO 105-F01, Textiles Tests for colour fastness Part F01: Specification for wool adjacent fabric ISO 105-F02, Textiles Tests for colour fastness Part F02: Specification for cotton and viscose adjacent fabrics ISO 105-F03, Textiles Tes
25、ts for colour fastness Part F03: Specification for polyamide adjacent fabric ISO 105-F04, Textiles Tests for colour fastness Part F04: Specification for polyester adjacent fabric BS EN ISO 11641:2012ISO 11641:2012(E) IULTCS/IUF 426:2012(E) 2 ISO 2012 All rights reservedISO 105-F05, Textiles Tests fo
26、r colour fastness Part F05: Specification for acrylic adjacent fabric ISO 105-F06, Textiles Tests for colour fastness Part F06: Specification for silk adjacent fabric ISO 105-F07, Textiles Tests for colour fastness Part F07: Specification for secondary acetate adjacent fabric ISO 105-F10, Textiles T
27、ests for colour fastness Part F10: Specification for adjacent fabric: Multifibre ISO 2418, Leather Chemical, physical and mechanical and fastness tests Sampling location ISO 3696:1987, Water for analytical laboratory use Specification and test methods 3 Principle A leather specimen is soaked in arti
28、ficial perspiration solution and a piece of adjacent fabric, also soaked in artificial perspiration solution, is laid against each side to be tested. The composite specimen is left under pressure for a specified time in a suitable apparatus. The leather specimen and adjacent fabric are then dried, a
29、nd the change in colour of the specimen and the staining of the adjacent fabric assessed with the grey scales. Leathers with a finish may be tested intact or with the finish broken. The general colour fastness testing principles shall be in accordance with those described in ISO 105-A01, taking into
30、 account that the substrate is leather. 4 Apparatus and materials Ordinary laboratory apparatus and 4.1 Test apparatus, consisting of a stainless-steel frame, into which a rectangular weight-piece approximately 5 kg in mass and approximately 115 mm 60 mm in cross-section fits accurately, so that a u
31、niform pressure of 12,5 1,0 kPa can be applied on the composite specimen placed between rectangular plates of an inert material, e.g. glass or acrylic-resin, of the same length and width as the weight-piece and about 1,5 mm thick. The test apparatus shall be constructed so that if the weight-piece i
32、s removed during the tests, the pressure of 12,5 kPa remains unchanged. Other devices may be used provided that equivalent results are obtained. NOTE An example of a suitable apparatus available commercially is given in Annex A. 4.2 Oven, maintained at 37 C 2 C. 4.3 Adjacent fabrics (see ISO 105-A01
33、). Either a) a multifibre adjacent fabric, complying with ISO 105-F10, measuring approximately 100 mm 40 mm, or b) two single-fibre adjacent fabrics, complying with the relevant specification in ISO 105-F01 to F07. NOTE Examples of suitable commercial sources are given in Annex A. 4.4 Demineralized
34、water, grade 3 in accordance with ISO 3696:1987. 4.5 Alkaline artificial perspiration solution, containing, per litre of solution: BS EN ISO 11641:2012ISO 11641:2012(E) IULTCS/IUF 426:2012(E) ISO 2012 All rights reserved 35,0 g of sodium chloride NaCl, 5,0 g of tris(hydroxymethyl)aminomethane NH2C(C
35、H2OH)3, 0,5 g of urea CO(NH2)2 and 0,5 g of nitrilotriacetic acid N(CH2COOH)3 (SAFETY NOTE Not to be ingested), and adjusted to pH 8,0 0,1 with hydrochloric acid (2 mol/l). SAFETY NOTE This artificial perspiration solution must not be ingested. It must not be pipetted by mouth. To prepare 1 litre of
36、 alkaline perspiration solution, dissolve the weighed-out components in about 900 ml of demineralized water (4.4) in a 2 litre beaker. Transfer to a 1 litre volumetric flask (4.14) and make up to volume with demineralized water. Check the pH of this solution with a pH meter (4.13) and add 2 mol/l hy
37、drochloric acid solution (4.15) drop by drop until the pH reaches 8,0 0,1. Smaller volumes can be prepared as required. Check the pH of the solution periodically and discard it if the pH is not within 8,0 0,1. Also discard the solution if colonies of microbes become visible. NOTE The composition of
38、this pH 8,0 alkaline perspiration solution differs from that specified in the textile method, ISO 105-E04. Typically, leather test laboratories are small and this perspiration solution can be kept for some weeks without changes in the pH. Whereas, the ISO 105-E04 alkaline perspiration solution is no
39、t pH stable and a fresh solution must be prepared each day. Experience has shown that for colour fastness testing of leather the most important aspect in making artificial perspiration solutions is the pH and not the composition. 4.6 Acid artificial perspiration solution, if required, composition ac
40、cording to ISO 105-E04. A freshly prepared solution using demineralized water (4.4), containing, per litre: 0,5 g of L-histidine monohydrochloride monohydrate C6H9O2N3HClH2O; 5,0 g of sodium chloride NaCl; 2,2 g of sodium dihydrogen orthophosphate dihydrate NaH2PO42H2O. While stirring, the solution
41、is brought to pH 5,5 0,2 with the drop-wise addition of a 0,1 mol/l sodium hydroxide. This solution shall be freshly prepared each day. NOTE Since the leather dyes are fixed under acid conditions, the colour fastness to acid perspiration has much less significance for leather compared with the colou
42、r fastness to alkaline perspiration. However, the acid perspiration solutions are often used in other test procedures and therefore are included here. For example, these are used to extract substances, such as heavy metals in ISO 17072-1, from leather. 4.7 Fine-grained adhesive paper, grade P 180. 4
43、.8 Grey scale for assessing staining, in accordance with ISO 105-A03. 4.9 Grey scale for assessing change in colour, in accordance with ISO 105-A02. 4.10 Spectrophotometer or colorimeter for assessing change in colour and staining, complying with ISO 105-A04 and ISO 105-A05. 4.11 Vessel suitable for
44、 evacuation, e.g. vacuum-desiccator. BS EN ISO 11641:2012ISO 11641:2012(E) IULTCS/IUF 426:2012(E) 4 ISO 2012 All rights reserved4.12 Vacuum pump, capable of evacuating the desiccator vessel (4.11) to approximately 5 kPa (50 mbar) within 4 min. 4.13 pH meter. 4.14 Volumetric flask, 1 000 ml. 4.15 Hyd
45、rochloric acid solution, 2 mol/l. 5 Test specimens 5.1 If the piece of leather available for testing is a whole hide or skin, then first take a sample in accordance with ISO 2418. 5.2 If the leather has a finish and is to be tested with the finish broken, prepare the test specimen as follows. Cut ou
46、t a piece of leather approximately 120 mm 50 mm and lay it out, finish-side down, on a sheet of abrasive paper (4.7), measuring approximately 150 mm 200 mm, held flat on a work surface. Load the upper side of the piece of leather uniformly with a 1 kg weight. Move the piece of leather approximately
47、100 mm to and fro on the abrasive paper, carrying out 10 to-and-fro cycles. NOTE With practice, the same roughening effect can be achieved holding the abrasive paper in the hand. Brush the roughened area thoroughly to remove all dust. From the roughened area of the leather, cut out a test specimen m
48、easuring approximately 100 mm 40 mm. To test leather for upholstery application with a surface coating, larger leather pieces, e.g. approximately 110 mm 50 mm can be used to avoid staining caused by contact of water with the leather fibres at the edge. The fact that the finish has been broken shall
49、be mentioned in the test report. 5.3 If the leather has no finish, or if it has a finish but is to be tested with the finish intact, simply cut out a test specimen measuring approximately 100 mm 40 mm. If the colour fastness to both alkaline and acid perspiration is being tested, a separate leather test specimen is required for each. 5.4 For each leather specimen, cut out a piece (or pieces) of adjacent fabric (4.3), i.e
