1、BRITISH STANDARD BSEN 20105-A02: 1995 ISO105-A02: 1993 Textiles Test for colour fastness Part A02: Grey scale for assessing change in colour The European Standard EN 20105-A02:1994 has the status of a British Standard UDC 677.016.47:677.016.41:535.653BSEN20105-A02:1995 This British Standard, having
2、been prepared under the directionof the Textiles and Clothing Standards Policy Committee, was published underthe authority of the Standards Board and comes into effect on 15 January 1995 BSI 02-1999 First published January 1993 Second edition January1995 The following BSI references relate to the wo
3、rk on this standard: Committee reference TCM/25 Special announcement in BSINews March 1994 ISBN 0 580 23143 7 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the
4、 following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardi
5、zation Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugu
6、s da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN20105-A02:1995 BSI 02-1999 i
7、Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Principle 3 3 Describing colour changes in fastness tests 4 National annex NA (informative) Committees responsible Inside back cover Table 1 Examples of descriptions of change in character 4 Table
8、2 Abbreviations of qualitative terms 4BSEN20105-A02:1995 ii BSI 02-1999 National foreword This British Standard has been prepared under the direction of the Textiles and Clothing Standards Policy Committee and is the English language version of EN20105-A02:1994 Textiles Test for colour fastness Part
9、 A02: Grey scale for assessing change in colour, published by the European Committee for Standardization (CEN), which is identical with ISO105-A02:1993, published by the International Organization for Standardization (ISO). It supersedes BSEN20105-A02:1993, which is withdrawn. The technical content
10、of this British Standard is identical with that of the corresponding method formerly published in BS1006:1990 Methods of test for colour fastness of textiles and leather. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respons
11、ible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 4, an inside back cover and a back cover. This
12、 standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN20105-A02 August 1994 UDC 677.016.47:677.016.41:535.653 Supersedes EN 20105-A02:1992 D
13、escriptors: Textiles, dyes, tests, determination, colour fastness, grey scale, colour differences English version Textiles Tests for colour fastness Part A02: Grey scale for assessing change in colour (ISO 105-A02:1993) Textiles Essais de solidit des teintures Partie A02: Echelle de gris pour l valu
14、ation des dgradations (ISO 105-A02:1993) Textilien Farbechtheitsprfungen TeilA02: Graumastab zur Bewertung der nderung der Farbe (ISO 105-A02:1993) This European Standard was approved by CEN on 1994-08-09. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
15、conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in t
16、hree official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of
17、Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat
18、: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 20105-A02:1994 EEN20105-A02:1994 BSI 02-1999 2 Foreword This European Standard has been taken over by CEN/TC248, Textiles and textile products, from the work of ISO/TC38, Texiles of the International Organizatio
19、n for Standardization (ISO). The content of this European Standard is identical to the International Standard ISO105-A02 Textiles Tests for colour fastness Part A02: Grey scale for assessing change in colour from1993. This European Standard shall be given the status of a national standard, either by
20、 publication of an identical text or by endorsement, at the latest by February1995, and conflicting national standards shall be withdrawn at the latest by February1995. This European Standard supersedes EN20105-A02:1992. In accordance with the common CEN/CENELEC Rules, the following countries are bo
21、und to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN20105-A02:1994 BSI 02-1999 3 1 Scope This part of ISO105 describes the grey scale
22、for determining changes in colour of textiles in colour fastness tests, and its use. A precise colorimetric specification of the scale is given as a permanent record against which newly prepared working standards and standards that may have changed can be compared. 2 Principle 2.1 The essential, or5
23、-step, scale consists of five pairs of non-glossy grey colour chips (or swatches of grey cloth), which illustrate the perceived colour differences corresponding to fastness ratings5,4,3,2 and1. This essential scale may be augmented by the provision of similar chips or swatches illustrating the perce
24、ived colour differences corresponding to the half-step fastness ratings4-5,3-4,2-3 and1-2, such scales being termed9-step scales. The first member of each pair is neutral grey in colour and the second member of the pair illustrating fastness rating5 is identical with the first member. The second mem
25、bers of the remaining pairs are increasingly lighter in colour so that each pair illustrates increasing contrasts or perceived colour differences which are defined colorimetrically. The full colorimetric specification is given below. 2.2 The chips or swatches shall be neutral grey in colour and shal
26、l be measured with a spectrophotometer with the specular component included. The colorimetric data shall be calculated using CIE1964 supplementary standard colorimetric system (10 observer data) for illuminant D 65 . 2.3 The Y tristimulus value of the first member of each pair shall be12 1. 2.4 The
27、second member of each pair shall be such that the colour difference between it and the adjacent first member is as follows: (Bracketed values apply only to the9-step scale.) 2.5 Use of the scale. Place a piece of the original textile and the tested specimen of it side by side in the same plane and o
28、riented in the same direction. Place the grey scale nearby in the same plane. The surrounding field should be neutral grey colour approximately midway between that illustrating grade1 and that illustrating grade2 of the grey scale for assessing change in colour (this is approximately Munsell N5). If
29、 necessary to avoid effects of the backing on the appearance of the textiles, use two or more layers of the original textile under both original and tested specimens. Illuminate the surfaces with north sky light in the Northern hemisphere, south sky light in the Southern hemisphere, or an equivalent
30、 source with an illumination of600lx or more. The light should be incident upon the surfaces at approximately45, and the direction of viewing approximately perpendicular to the plane of the surfaces. Compare the visual difference between original and tested material with the differences represented
31、by the grey scale. If the5-step scale is used, the fastness rating of the specimen is that number of the grey scale which has a perceived colour difference equal in magnitude to the perceived colour difference between the original and the treated specimens; if the latter is judged to be nearer the i
32、maginary contrast lying midway between two adjacent pairs than it is to either, the tested specimen is given an intermediate assessment, for example4-5 or2-3. A rating of5 is given only when there is no perceived difference between the tested specimen and the original material. If the9-step scale is
33、 used, the fastness rating of the specimen is that number of the grey scale which has a perceived colour difference nearest in magnitude to the perceived colour difference between the original piece and the tested specimen. A rating of5 is given only when there is no perceived difference between the
34、 tested specimen and the original material. When a number of assessments have been made, it is very useful to compare all the pairs of original and tested specimens which have been given the same numerical rating. This gives a good indication of the consistency of the assessments, since any errors b
35、ecome prominent. Pairs which do not appear to have the same degree of contrast as the remainder of their groups should be re-checked against the grey scale and, if necessary, the rating should be changed. Fastnessgrade CIELAB difference Tolerance 5 0 0,2 (4-5) 0,8 0,2 4 1,7 0,3 (3-4) 2,5 0,35 3 3,4
36、0,4 (2-3) 4,8 0,5 2 6,8 0,6 (1-2) 9,6 0,7 1 13,6 1,0EN20105-A02:1994 4 BSI 02-1999 3 Describing colour changes in fastness tests 3.1 In using the grey scale, as outlined in2.5, the character of the change in colour, whether in hue, depth, brightness or any combination of these, is not rated: the ove
37、rall difference or contrast, between original and tested specimens, is the basis for the assessment. 3.2 If, as in rating dyes on textiles for example, it is desired to record the character of the change in colour of the textile in the test, appropriate qualitative terms may be added to the numerica
38、l rating, as illustrated by the examples shown in Table 1. Table 1 Examples of descriptions of changein character 3.3 When changes in colour occur in two or three directions, it is considered neither feasible nor necessary to indicate the relative magnitude of each change. 3.4 When the space availab
39、le for recording qualitative terms is restricted, as on pattern cards, the abbreviations shown in Table 2 may be used. Table 2 Abbreviations of qualitative terms Meaning Rating Contrast corresponding tofollowing gradesofgrey scale Characterofchange 3 Grade 3 Loss in depth of colour only 3 redder Gra
40、de 3 No significant loss in depth but colour redder 3 weaker yellower Grade 3 Loss in depth and change in hue 3 weaker bluer duller Grade 3 Loss in depth and change in both hue and brightness 4-5 redder Intermediate between grades 4 and 5 No significant loss in depth but colour slightly redder Abbre
41、viation Meaning French abbreviation Bl Bluer B G Greener V R Redder R Y Yellower J W Weaker C Str Stronger F D Duller T Br Brighter PuBSEN20105-A02:1995 BSI 02-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard wa
42、s entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/25, upon which the following bodies were represented: Association of Consulting Scientists Association of Suppliers to the British Clothing Industry Limited British Retail Consortium British Textil
43、e Confederation Chemical Industries Association Home Laundering Consultative Council International Wool Secretariat Mail Order Traders Association Ministry of Defence National Wool Textile Export Corporation SATRA Footwear Technology Centre Soap and Detergent Industry Association Society of Dyers an
44、d Colourists Textile Finishers Association Textile Research Council (FCRA) Participation in the detailed technical work was undertaken by the Society of Dyers and Colourists.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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