1、STD-BSI BS EN IS0 1OS-B3-ENGL 1997 m lb24bb7 b32918 485 m BRITISH STANDARD Textiles - Tests for colour fastness Part B03. Colour fastness to weathering: Outdoor exposure (IS0 105-BO3 : 1994) The European Standard EN IS0 105-BO3 : 1997 has the status of a British Standard ICs 59.080.01 NO COPYING WiT
2、HOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 105-BO3 1997 BS EN IS0 105-BO3 : 1997 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on
3、15 August 1997 O BSI 1997 ISBN O 580 27821 2 National foreword This British Standard is the English language version of EN IS0 105B03 : 1997. It is identical with IS0 105B03 : 1994. It supersedes the correspondmg method in BS 1006 : 1990 which is withdrawn by amendment. The UK participation in its p
4、reparation was entrusted by Technical Committee Wi25, Chemical properties, to Subcommittee TCY25/JlO, Colour fastness, 3lrliich has the responsibility to: - aid enquirem to understand the text; - present to the responsible internationaVEuropean committee any enquiries on the interpretation, or propo
5、sals for change, and keep the UK interests informed - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact tha annex
6、 ZA lists nomaiive references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled Internaiional Standards Correspondence
7、 Index, or using the Find facility of the BSI Standards Elecbonic Catalogue. 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, the EN IS0 title page, the EN IS0 foreword page, t
8、he IS0 title page, page ii, pages 1 to 6, the annex ZA page, a blank page, an inside back cover and a back cover. Amendments issued since publication Amd. No. I Date I Text affected I -, STD*BSI BS EN IS0 LOS-BCI3-ENGL I997 Lb24bb7 Ob31920 033 = EUROPEAN STANDARD NORME EUROPEENNE EUROPISCHE NORM EN
9、IS0 105-803 April 1997 ICS f9.080.01 Descriptors: see IS0 document English version Textiles - Tests for colour fastness - Part B3: Colour fastness to weathering: Outdoor exposure (IS0 1 0!5-803: 1 994) Textiles - Essais de solidit des teintures - Partie 803: Solidit des teintures aux intempries: Exp
10、osition en plein air (IS0 105-803:1994) Textilien - Farbechtheitsprfungen - Teil 803: Farkhtheit gegen Bewetterung: Bewetterung im Freien (IS0 105-803:1994) This European Standard was approved by CEM on 1997-03-28. CEN nnkrs are bound to canply with the CEM/CENELEC Internal Regulations which stipula
11、te the conditions for giving this European Standard the status of a national standard uithout any alteration. Up-to-date lists and bibliographieal references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN nwmkr. The European Standards exfst
12、 in three official versions (English, French, German). A version in any other language made by translation uidcr the responsibility of a CEN mnikr into its own language and notified to the Central Secretariat has the same status as the official versions. CEM nmikrs are the national standards bodies
13、of Austria, Belgiun, Dmrk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxenbourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Camittee for Stadrdization Comite EuropCan de Normalisation Europiiisches Kunitee fr Normung Central Secretaria
14、t: rue dc Staesart,36 E-1050 Eruuclr e 1997 CEH - All rights of exploitation in any form and by any means reserved uorlduide for CEN nationil M in such cases, method 2 (see 6.31 shall be used. 2 STD-BSI BS EN IS0 LUS-B03-ENGL 1777 Lb24bb7 Ub3172b 551 6.2.2 Expose the specimens and the blue wool ref-
15、 erences under the conditions described in 6.1 until the contrast between the exposed specimens and a por- tion of the original fabric is equal to grey scale grade 3. Remove one of the specimens and cover the left-hand one-third of the references with an additional opaque cover. 6.2.3 Continue the e
16、xposure until the contrast be tween the remaining specimen and a portion of the original fabric is equal to grey scale grade 2. If refer- ence 7 fades to a contrast equal to grey scale grade 4 before the contrast between the specimen and a portion of the original fabric is equal to grey scale grade
17、2, the exposure may be concluded at this stage and the remaining specimen and the references removed. 6.2.4 Wash both specimens, and a portion of the original fabric, and prepare them for assessment (see 6.5 and 6.6). 6.2.5 Assess the colour fastness to weathering in accordance with the method given
18、 in 7.1 to 7.4. 6.3 Method 2 I E - E - - 6.3.1 This method should be used when the number of specimens to be tested simultaneously is so large _. * tn * that method 1 is impracticable. The basic feature of this method is the control of the exposure period by inspection of the references, which allow
19、s a number of specimens differing in weathering fastness to be tested against only one set of blue wool references, thus conserving supplies of the latter. 6.3.2 Expose the specimens and the blue wool ref- erences under the conditions described in 6.1 until the contrast between the exposed and unexp
20、osed portions of Reference 6 is equal to grey scale grade 4. At this stage remove one specimen from each pair and cover the left-hand one-third of the ref- erences with an additional opaque cover. 6.3.3 Continue the exposure until the contrast be- tween the fully exposed and unexposed portions of Re
21、ference 7 is equal to grey scale grade 4. Remove the remaining specimens and the references. 6.3.4 Wash and dry the exposed specimens and a portion of the original fabric from each specimen and prepare them for assessment (see 6.4 and 6.5). 6.3.5 Assess the colour fastness to weathering of aach spec
22、imen in accordance with the method given in 7.1 to 7.3. EN IS0 105-BO3 : 1997 6.4 Method 3 Where the test is to be used to check conformity to agreed-upon radiant energy levels, it is permissible to expose the specimens alone or with reference sam- ples. The specimens shall be exposed until the spec
23、- ified amount of radiant energy is reached, then removed together with the reference samples and evaluated as directed in 7.4. 6.5 Washing Wash the exposed specimens and a portion of the original fabric measuring at least 40 mm x 100 mm (in the absence of adjacent fabrics) in accordance with IS0 10
24、5-Col. 6.6 Mounting Trim and mount the washed specimens, one on each side of the washed original fabric which has been trimmed to the same size and shape as the speci- mens. The specimen exposed for the shorter length of time shall be mounted on the left. 7 Assessment of colour fastness to weatherin
25、g 7.1 Assess the magnitude of the contrast between the specimen exposed for the shorter time and the original fabric in terms of the contrasts produced in the blue wool references exposed for the same pe- riod: the assessment is the number of the reference showing the contrast closest to that of the
26、 specimen. If the specimen shows changes in colour approxi- mately half-way between two references, an appro- priate half-rating, for example 3-4, shall be given. 7.2 Assess the magnitude of the contrast between the specimen exposed for the longer time and the original fabric in terms of the contras
27、ts produced in the blue wool references exposed for the same pe- riod: the assessment is the number of the reference showing the contrast closest to that of the specimen. If the specimen shows changes approximately half- way between two references, an appropriate half- rating, for example 5.6, shall
28、 be given. 7.3 If specimens larger than the references are ex- posed, a mask of a neutral grey colour approximately midway between that illustrating grade 1 and that il- lustrating grade 2 of the grey scale for assessing change in colour (approximately Munsell N5) shall be used in assessment, the ma
29、sk covering the surplus area of the specimens and leaving an area equal to 3 STD-BSI BS EN IS0 LOS-BU3-ENGL 1777 Lb24bb7 Ob31727 478 H EN IS0 105-BO3 : 1997 that of the references open for comparative evalu- ation. 7.4 The assessment of the coiour fastness accord- ing to method 3 (see 6.4) is perfor
30、med with the grey scale for assessing change in colour (4.2.4) in accord- ance with IS0 105A02, or alternatively by compar- ison of the coiour change of the sample with that of the blue wool references. 8 Testreport The test report shall include the following information: b) all details necessary fo
31、r complete identification of the sample tested; c) for methods 1 and 2, the numerical blue wool rating for weathering fastness: outdoor exposure. If the two assessments (see 7.1 and 7.2) are dif- ferent, report only the lower; d) for method 3, either the numerical rating for the change in colour of
32、the sample, or the numerical rating for weathering fastness: outdoor exposure; e) the place of exposure and datehime of beginning and end of the exposure. a) the number and year of publication of this pan of IS0 105, .e. IS0 105-803:1994; 4 STD*BSI BS EN IS0 LOS-BU3-ENGL 1997 Lb24bb9 Ob3L928 329 EN
33、IS0 106-BO3 : 1997 Annex A (informative) General information on colour fastness to light A.1 When in use, textiles are usually exposed to light. Light tends to destroy colouring matters and the result is the well known defect of “fading“, whereby coloured materials change colour - usually becoming p
34、aler and duller. Dyes used in the textile industry vary enormously in their resistance to light and it is obvious that there need to be some method of measuring their fastness. The substrate also influences the col- our fastness of a dye to light. This part of IS0 105 cannot satisfy completely all t
35、he interested parties (who range from dye manufacturers and the textile industry to wholesale and retail traders and the general public) without becoming technically involved and possibly difficult to understand by many who have a direct interest in its application. - = - e - - - ie v) ie A.2 The fo
36、llowing non-technical description of a test for colour fastness to light has been prepared for the benefit of those who find the detailed technicalities of this par of IS0 105 difficult to under- stand. The method is to expose the pattern being tested and to expose also, at the same time and un- der
37、 the same conditions, a series of colour fastness references which are pieces of wool cloth dyed with blue dyes of different degrees of fastness. When the pattern has faded sufficiently, it is compared with the references and if it has behaved, for instance, like reference 41, then its colour fastne
38、ss is said to be 4. A.3 The colour fastness references should cover a wide range, since some patterns fade noticeably after exposure for 2 h or 3 h to bright summer sunshine, although others may withstand long exposure without change, the dyes in fact out-iiving the material to which they have been
39、applied. Eight references have been chosen, reference 1 being the most fugitive and reference 8 the most resistant. If it takes a certain length of time for reference 4 to fade under certain conditions, then the same amount of fading will occur on reference 3 in approximately half that time, or on R
40、eference 5 in approximately twice that time, pro- vided that the conditions are the same. A.4 It is necessary to ensure that different people testing the same material will fade it to the same ex- tent before assessment against the simultaneously faded reference. The ultimate users of dyed materiil
41、differ widely in what they consider to be “faded arti- cles“ and therefore patterns under test are faded to two different degrees which adequately cover most opinions and make assessment more reliable. These required degrees of fading are defined by reference to a collection of “grey scale“ referenc
42、e contrasts (grey scale 5 equals no contrast, grey scale 1 equals large contrast). Thus the use of the grey scale enables fading to be taken to defined extents, and the blue wool cloths enable the colour fastness to be rated. This general principle of assessing on the basis of moderate and severe fa
43、ding is complicated, however, by the fact that some patterns on exposure undergo a light change very rapidly indeed but do not change further for a long time. These slight changes are such that under normal conditions of use they would sel- dom be observed, but in certain cases they become important
44、, as the following example shows. A retailer has a length of curtain fabric in his window and on it is a cardboard ticket indicating the price. Af- ter a few days the ticket is removed and careful ex- amination reveals the place where it has been resting because the surrounding cloth has changed sha
45、de slightly on exposure to light. Some of this curtain material is exposed so as to produce a moderate de- gree of fading and it is found that reference7 has faded to the same extent; the general colour fastness of the fabric is therefore 7. 1) The designations of the colour fastness references refe
46、rred ot here are those of the European set (see IS0 105-801:1994, 4.1.1). The principles explained are equally valid for the American set (see IS0 105801:1994. 4.1.21. 5 STD-BSI BS EN IS0 LOS-BU3-ENGL 1997 Lb2qbb7 Ob31727 2b0 M EN IS0 106-BO3 : 1997 The important factor about this slight change in s
47、hade is that it can only be detected when there is a sharp boundary between the exposed and unexposed areas, and these conditions rareiy occur during normal use. The magnitude of this slight change would be given as an additional assessment in brackets. Thus a rating for a test could be 7(2), indica
48、ting a slight initial change equivalent to the first perceptible fade of ref- erence 2, but otherwise a high colour fastness of 7. A.5 A further unusual colour change is also catered for, namely photochromism. This effect is shown when a dye changes colour rapidly on exposure to strong light but on
49、removal to a dark place the original colour returns more or less completely. The extent of photochromism is determined by the special test de- scribed in IS0 105805. and is shown in the rating by a number following the letter P within brackets; for example 6(P2) means a photochromic effect equal to a grey scale 2 contrast but permanent fading equal to that of reference 6. A.6 Finally, there are many patterns which change hue on prolonged exposure to light; for example, a yellow may become brown, or a purple may become blue. In the past there have been many arguments as
