1、DEUTSCHE NORM October 1994 DIN Tests for colour fastness of textiles Grey scale for assessing staining Encilish version of DIN EN 20 105-AO3 EN 20 105-AO2 (IS0 105-AO3: 1993) This standard incorporates the English version of Is0 105-AO3. ICs 59.020 Descriptors: Textiles, colour fastness, grey scale,
2、 staining. Textilien; Farbechtheitsprfungen. Teil A03: Graumastab zur Bewertung des Anblutens (IS0 105-AO3 : 1993) Supersedes DIN 54002, August 1982 edition. European Standard EN 20105-A03: 1994 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard
3、has been published in accordance with a decision taken by CEN/TC 248 to adopt, without alteration, International Standard IS0 105-AO3 as a European Standard. The responsible German body involved in its preparation was the Normenausschu Maferialprfung (Materials Testing Standards Committee). Amendmen
4、ts DIN 54002, August 1982 edition, has been superseded by the specifications of EN 20105-A03, which is identical to IS0 105-A03. Previous editions DIN 53950: 1954-01; DIN53951: 1954-01; DIN 54002: 1958-11, 1969-12, 1982-08. International Patent Classification D 06 H O03100 G O1 N O33136 EN comprises
5、 4 pages. Beuth Verlag GmbH. Berlin, has the exclusive right of sale for German Standards(D1N-Normen). DIN EN 20 105-AO3 Engl. Price group 5 03.95 Sales No. 11 05 EUROPEAN STANDARD NORME EUFIOPEENNE EUROPAISCHE NORM EN 20 105-AO3 August 1994 UDG 677.01 6.47 : 677.01 6.41 : 535.653 Supersedes EN 20 1
6、05-AO3 : 1992. Descriptors: Textiles, colour fastness, grey scale, staining. English version Textiles Tests for colour fastness Part A03: Grey scale for assessing staining (IS0 1 05-AO3 1993) Textiles; essais de solidit des teintures. Partie A03: chelle de gris pour l?valuation des dgorgements Texti
7、lien; Farbechtheitsprfungen. Teil A03: Graumastab zur Bewertung des Anblutens (IS0 105-A03:1993) (IS0 105-A03:1993) This European Standard was approved by GEN on 1994-08-09 and is identical to the IS0 Standard as referred to. CEN members are bound to comply with the CENKENELEG Internal Regulations w
8、hich 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 Central Secretariat or to any CEN member. This European
9、 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 as the official versions. GEN members are the national
10、 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 Europen de Normalisation Europisches Komitee fr Normun
11、g Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1994. Copyright reserved to all GEN members. Ref. No. EN 20 105-AO3 : 1994 E Page 2 EN 20 105-AO3 : 1994 Foreword International Standard IS0 105-AO3 Textiles; tests for colour fastness; grey scale for assessing staining has been taken over
12、 as a European Standard by CENTTC 248 Textiles and textile products from the work of ISOTTC 38 Textiles of the International Organization for Standardization (ISO). This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement,
13、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, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembour
14、g, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of the International Standard IS0 105-A03:1993 was approved by CEN as a European Standard without any modification. Page 3 EN 20 105-AO3 : 1994 1 scope This part of IS0 105 describes the grey
15、 scale for de- termining staining of adjacent fabrics 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 that may have changed can be com pa red. 2 Principle 2.1 The
16、essential, or 5-step, scale consists of five pairs of non-glossy grey or white colour chips (or swatches of grey or white cloth), which illustrate the perceived colour differences corresponding to fast- ness ratings 5, 4, 3, 2 and 1. This essential scale may be augmented by the provision of similar
17、chips or swatches illustrating the perceived colour differences corresponding to the half-step fastness ratings 45, 3-4, 2-3 and 1-2, such scales being termed 9-step scales. The first member of each pair is white in col- our and the second member of the pair illustrating fastness rating 5 is identic
18、al with the first member. The second members of the remaining pairs are in- creasingly darker 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
19、 shall be white or neutral grey in colour and shall be measured with a spectrophotometer with the specular component in- cluded. The colorimetric data shall be calculated using CIE 1964 supplementary standard colorimetric sys- tem (1 o“ observer data) for illuminant D63 2.3 The Y tristimulus value o
20、f the first member (white) of each pair shall be not less than 85. 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: Fasness CIELAB differ- To,erance grade ence 5 (4-5) 4 (3-4) 3 (2-31 2 (1 -2) 1 O 2,2 4,3 6.0 45 12,o
21、16,9 24,O 34,l o. 2 I03 I03 f 0,4 f 0.5 I0,7 f 1.0 i 13 f 20 (Bracketed values apply only to the 9-step scale.) 2.5 Use of the scale. Place a piece of the un- stained, adjacent fabric (the original piece) and the piece which has been part of a composite specimen in a fastness test (the tested specim
22、en) side by side in the same plane. The surrounding field should be neutral grey colour approximately midway between that illustrating grade 1 and that illustrating grade 2 of the grey scale for assessing change in colour (this is approximately Munsell N5). If necessary to avoid effects of the backi
23、ng on the appearance of the tex- tiles, use two or more layers of the unstained undyed textile under both original and treated pieces. Illumi- nate the surfaces with north sky light in the Northern hemisphere, south sky light in the Southern hemi- sphere, or an equivalent source with an illumination
24、 of 600 Ix or more. The light should be incident upon the surfaces at approximately 45“, and the direction of viewing approximately perpendicular to the plane of the surfaces. Compare the visual difference be- tween the original piece and the tested specimen with the differences represented by the g
25、rey scale. Page 4 EN 20 105-A03 : 1994 If the 5-step scale is used, the degree of staining of the tested specimen is that number of the grey scale which has a perceived colour difference equal in magnitude to the perceived colour difference be- tween the original and the tested specimens; if the lat
26、ter is judged to be nearer the imaginary contrast lying midway between two adjacent pairs than it is to either, the tested specimen is given an intermediate assessment, for example 4-5 or 2-3. A rating of 5 is given only when there is no perceived difference be- tween the tested specimen and the ori
27、ginal piece. If the S-step scale is used, the degree of staining of the tested specimen is that number of the grey scale which has a perceived colour difference nearest in magnitude to the perceived colour difference be- tween the original piece and the tested specimen. A rating of 5 is given only w
28、hen there is no perceived difference between the tested specimen and the original piece. 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 be- come 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.
