1、DEUTSCHE NORM October 1994 Tests for colour fastness of textiles Grey scale for assessing change in colour English version of DIN EN 20 105-AO2 (IS0 105-AO2 : 1993) IEN 20 105-AO2 This standard incorporates the English version of Is0 1 05-AO2. ICs 59.020 Descriptors: Textiles, colour fastness, grey
2、scale, change in colour. Textilien; Farbechtheitsprfungen. Teil A02: Graumastab zur Bewertung der nderung der Farbe (IS0 i 05-A02: i 993) Supersedes DIN 54 001, August 1982 edition. European Standard EN 20 105-AO2 : 1994 has the status of a DIN Standard. A comma is used as the decimal marker. Nation
3、al foreword This standard has been published in accordance with a decision taken by CEN/TC 248 to adopt, without alteration, International Standard IS0 105-AO2 as a European Standard. The responsible German body involved in its preparation was the Normenausschu Materialprfung (Materials Testing Stan
4、dards Committee). Amendments DIN 54001, August 1982 edition, has been superseded by the specifications of EN 20105-A02, which is identical to IS0 105-A02. Previous editions DIN 53950: 1954-01; DIN 53951: 1954-01; DIN 54001: 1958-1 1, 1962-07, 1969-12, 1982-08. International Patent Classification D 0
5、6 H 003/00 G O1 N 033/36 EN comprises 4 pages. BeUth Verlag GrnbH, Berlin, has the exclusive right of sale for German Standards (DrN-Normen). DIN EN 20 105-AO2 Engl. Price group 5 03.95 Sales Na. 11 05 EUROPEAN STANDARD EUROPAISCHE NORM NORME EUROPENNE EN 20 105-AO2 August 1994 UDC 677.016.47:677.01
6、6.41 :535.653 Descriptors: Textiles, colour fastness, grey scale, change in colour. Supersedes EN 20105-A02:1992. English version Texti I es Part A02: Grey scale for assessing change in coiour Tests for colour fastness (IS0 105-AO2 : 1993) Textiles; essais de solidit des teintures. PartieA02: chelle
7、 de gris pour lvaluation des dgradations Textilien; Farbechtheitsprfungen. Teil A02: Graumastab zur Bewertung der nderung der Farbe (IS0 105-A02:1993) (IS0 105-A02:1993) This European Standard was approved by CEN on 1994-08-09 and is identical to the IS0 Standard as referred to. CEN members are boun
8、d to comply with the CENKENELEC Internal Regulations which stipu- late the 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 C
9、entral Secretariat 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 its own language and notified to the Central Secretariat has the same status
10、as the official versions. GEN members are the national standards bodies of 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
11、Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-i050 Brussels 8 1994. Copyright reserved to all CEN members. Ref. No. EN 20 105-AO2 : 1994 E Page 2 EN 20 105-AO2 : 1994 Foreword International Standard IS0 105-AO2 Textiles; tests for colour fastness;
12、 grey scale for assessing change in colour has been taken over as a European Standard by CEN/TC 248 Textiles and textile products from the work of ISO/TC 38 Textiles of the International Organization for Standardization (ISO). This European Standard shall be given the status of a national standard,
13、either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by February 1995 at the latest. In accordance with the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finlan
14、d, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of the International Standard ISO105-A02:1993 was approved by CEN as a European Standard without any modification. Page 3 EN 20 1
15、05-AO2 : 1994 1 Scope This part of IS0 105 describes the grey scale for de- termining changes in colour of textiles in colour fast- ness tests, and its use. A precise colorimetric specification of the scale is given as a permanent record against which newly prepared working stan- dards and standards
16、 that may have changed can be compared. 2 Principle 2.1 The essential, or 5-step, scale consists of five pairs of non-glossy grey colour chips (or swatches of grey cloth), which illustrate the perceived colour dif- ferences corresponding to fastness ratings 5, 4, 3, 2 and 1. This essential scale may
17、 be augmented by the provision of similar chips or swatches illustrating the perceived colour differences corresponding to the half-step fastness ratings 4-5, 3-4, 2-3 and 1-2, such scales being termed 9-step scales. The first member of each pair is neutral grey in colour and the second member of th
18、e pair illustrating fastness rating 5 is identical with the first member. The second members 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 specific
19、ation is given below. 2.2 The chips or swatches shall be neutral grey in colour and shall be measured with a spectro- photometer with the specular component included. The colorimetric data shall be calculated using CIE 1964 supplementary standard colorimetric sys- tem (1 O“ observer data) for illumi
20、nant DB5. 2.3 The Y tristimulus value of the first member of each pair shall be 12 f 1. 2.4 The second member of each pair shall be such that the colour difference between it and the adjacent first member is as follows: Fastness CIELAB differ- To,eran grade ence 5 (4-51 4 (3-41 3 (2-31 2 (1-2) 1 O 0
21、,8 1,7 23 3,4 48 6,8 9,6 13,6 02 _+ 02 f 03 f 035 IT 0,4 f 03 f 0.6 f 0,7 1.0 (Bracketed values apply only to the Sstep 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 oriented in the same direction. Place the grey
22、scale nearby in the same plane. The surrounding field should be neutral grey colour ap- proximately midway between that illustrating grade 1 and that illustrating grade 2 of the grey scale for as- sessing change in colour (this is approximately Munsell N5). If necessaty to avoid effects of the backi
23、ng 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 source with an illumination of 600 lx o
24、r more. The light should be incident upon the surfaces at approxi- mately 45, and the direction of viewing approximately perpendicular to the plane of the surfaces. Compare the visual difference between original and tested ma- terial with the differences represented by the grey scale. Page 4 EN 20 1
25、05-AO2 1994 I Rang 3 3 redder If the 5-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
26、nearer the imaginary contrast lying midway be- tween two adjacent pairs than it is to either, the tested specimen is given an intermediate assess- ment, for example 4-5 or 2-3. A rating of 5 is given only when there is no perceived difference between the tested specimen and the original material. Me
27、aning Contrast corresponding grades of grey to following Charaetet of change Grade 3 Grade 3 Loss in depth of colour only No significant loss in depth but dour redder If the %step scale is used, the fastness rating of the specimen is that number of the grey scale which has a perceived colour differe
28、nce nearest in magnitude to the perceived colour difference between the original piece and the tested specimen. A rating of 5 is given only when there is no perceived difference between the tested specimen and the original material. 3 weaker yellower When a number of assessments have been made, it i
29、s 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 be- come prominent. Pairs which do not appear to have the same degree of contrast as the remai
30、nder of their groups should be re-checked against the grey scale and, if necessary, the rating should be changed. Grade 3 Loss in depth and change in hue 3 Describing colour changes in fastness tests I Abbroviation EI G R Y 3.1 In using the grey scale, as outlined in 2.5, the character of the change
31、 in colour, whether in hue, depth, brightness or any combination of these, is not rated: the overall difference or contrast, between original and tested specimens, is the basis for the assessment. French abbreviation Me an in g Bluer B Greener V Redder R Yellower J 3.2 If, as in rating dyes on texti
32、les 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 numerical rating, as illustrated by the examples shown in table 1. Table 1 - Examples of descriptions of change in character bluer duller tween
33、 grades 4 Loss in depth and change in both hue and brightness No significant loss in depth but colour slightly redder 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 available for recording quali- tative terms is restricted, as on pattern cards. the ab- breviations shown in table2 may be used. W Str D Er Weaker Stronger Duller Brighter I C F T Pu
