1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 105-A11:2012T e x t i l e s T e s t s f o r c o l o u r fastnessPart A11: Determination of colour fastness grades by digital imaging techniquesBS EN ISO 105-A11:2012 BR
2、ITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 105-A11:2012.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/81, Colour fastness and colour measurement oftextiles.A list of organizations represented on this committee can beobtai
3、ned on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012 ISBN 978 0 580 66212 6 ICS 59.080.01 Compliance wit
4、h a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2013. Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 1
5、05-A11 September 2012 ICS 59.080.01 English Version Textiles - Tests for colour fastness - Part A11: Determination of colour fastness grades by digital imaging techniques (ISO 105-A11:2012) Textiles - Essais de solidit des coloris - Partie A11: Dtermination des degrs de solidit des coloris par des t
6、echniques dimagerie numrique (ISO 105-A11:2012) Textilien - Farbechtheitsprfungen - Teil A11: Bestimmung von Farbechtheitszahlen durch digitale Bildgebungsverfahren (ISO 105-A11:2012) This European Standard was approved by CEN on 14 September 2012. CEN members are bound to comply with the CEN/CENELE
7、C 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 references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or
8、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 CEN-CENELEC Management Centre has the same status as the offic
9、ial versions. CEN members are the national standards bodies of 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,
10、Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation
11、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 105-A11:2012: EBS EN ISO 105-A11:2012EN ISO 105-A11:2012 (E) 3 Foreword This document (EN ISO 105-A11:2012) has been prepared by Technical Committee ISO/TC 38 “Textiles“ in collaboration with Technical Committe
12、e CEN/TC 248 “Textiles and textile products” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2013, and conflicting national standards shall be withdr
13、awn at the latest by March 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, th
14、e national standards organisations of the following countries are bound to implement 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, Latvi
15、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 105-A11:2012 has been approved by CEN as a EN ISO 105-A11:2012 without any modification. BS EN ISO 105-A1
16、1:2012ISO 105-A11:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv1 Scope 12 Normative references . 13 Terms and definitions . 14 Apparatus 24.1 General . 24.2 Digital camera . 24.3 Illumination cabinet 4Annex A (normative) Assessment of the change in colour of a test specimen . 6Ann
17、ex B (normative) Assessment of staining of a test specimen 9Annex C (normative) Verification chart 12Annex D (informative) Summary of report and conclusions of international trial for determination of colour fastness grades by digital imaging techniques .14Bibliography .16BS EN ISO 105-A11:2012ISO 1
18、05-A11:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject
19、for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) o
20、n all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees ar
21、e circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held re
22、sponsible for identifying any or all such patent rights.ISO 105-A11 was prepared by Technical Committee ISO/TC 38, Textiles, Subcommittee SC 1, Tests for coloured textiles and colorants.ISO 105 consists of many parts designated by a part letter and a two-digit serial number (e.g. A01), under the gen
23、eral title Textiles Tests for colour fastness. A complete list of these parts is given in ISO 105-A01.iv ISO 2012 All rights reservedBS EN ISO 105-A11:2012INTERNATIONAL STANDARD ISO 105-A11:2012(E)Textiles Tests for colour fastness Part A11: Determination of colour fastness grades by digital imaging
24、 techniques1 ScopeThis part of ISO 105 specifies the requirement for a digital imaging system for use in the methods specified in Annexes A and B for the determination of change in colour and staining by digital imaging techniques.This method is not suitable for assessment of colour fastness to ligh
25、t as described in the ISO 105 B series, as these standards do not use grey scales to assess the specimen.This part of ISO 105 describes apparatus, equipment settings and calibration for the assessment of change in colour, and staining.2 Normative referencesThe following referenced documents are indi
26、spensable 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 amendments) applies.ISO 105-A01, Textiles Tests for colour fastness Part A01: General principles of testingCIE1)P
27、ublication S 012/E, Standard method of assessing the spectral quality of daylight simulators for appraisal and measurement of colourCIE Publication 13.3, 1995, Method of measuring and specifying the colour rendering properties of light sources, 2nd edition3 Terms and definitionsFor the purposes of t
28、his document, the following terms and definitions apply.3.1system greycolour of the internal surfaces and apparatus that would normally be visible in a captured imageNOTE System grey shall be approximately between Munsell N5 and N7 and within CIELAB Lightness value of 50 or 70 2,0 and CIELAB Chroma
29、value not exceeding 2,5 in any hue direction under D65 and CIE 1964 standard colorimetric observer, respectively.1) Commission Internationale dclairage, Central Bureau, Kegelgasse 27, A-1030, Vienna, Austria. ISO 2012 All rights reserved 1BS EN ISO 105-A11:2012ISO 105-A11:2012(E)3.2verification char
30、t2)chart consisting of a series of colour patches of known colorimetric valuesSee Annex C.3.3system softwaresoftware required to control and operate the digital camera3.4white tiletile whose colour is certified and traceable to a national standardEXAMPLE Standard provided by the National Physical La
31、boratory in the UK.3.5operator-selected areaassessment for either staining or change in colour where the system operator manually selects both the location and size of the specimen test area for the reference and tested pieces3.6automatic gradingassessment for either staining or change in colour whe
32、re the system software selects both the location and size of the specimen test area for the reference and tested pieces4 Apparatus4.1 GeneralThe test apparatus consists of a verified digital camera (4.2)3), which is mounted on an illumination cabinet (4.3) that gives a controlled and consistent ligh
33、ting environment. Specimens may be presented for grading individually, in multiples, or in one of a series of pre-defined templates depending on the type of test being carried out. The operator shall manually select the area to be assessed for grading.Automatic grading (3.6) of specimens is permitte
34、d, provided that the grades produced by this method agree with those achieved by the Operator-Selected Area method (3.5).The equipment shall be maintained and calibrated or verified, as appropriate, in accordance with the manufacturers instructions.4.2 Digital camera4.2.1 Digital camera specificatio
35、n4.2.1.1 ResolutionThe digital camera shall have an effective resolution of not less than 3,0 M pixels.2) A verification chart as described in 3.2 and Annex C is manufactured commercially as the DigiEye DigiTizer series camera calibration chart and is available from VeriVide Limited, Quartz Close, W
36、arrens Business Park, Enderby, Leicester, LE19 4SG, United Kingdom. Tel: +44 (0) 116 2847790; Email: This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of this product.3) The apparatus as described in Clause 4 with software as descr
37、ibed in Annexes A and B manufactured commercially as the DigiEye is available from VeriVide Limited, Quartz Close, Warrens Business Park, Enderby, Leicester, LE19 4SG, United Kingdom. Tel: +44 (0) 116 2847790; Email: . This information is given for the convenience of users of this document and does
38、not constitute an endorsement by ISO of this product.2 ISO 2012 All rights reservedBS EN ISO 105-A11:2012ISO 105-A11:2012(E)4.2.1.2 Optical zoomThe digital camera shall be capable of capturing the whole of the specimen assessment area in one image. In order for the image quality to be preserved, any
39、 adjustment of the focal length of the camera necessary to capture a suitable image shall be by optical means rather than digital.4.2.1.3 PC connectionThe camera connection to an external computer is done by using a suitable connection for image capture, download and camera control.4.2.1.4 Camera se
40、ttingsThe system software (3.3) shall control all camera settings and shutter release operations needed for routine setup and imaging. The system software shall have a provision to store and set the operating settings required for different grading requirements.4.2.2 Camera mountingThe digital camer
41、a shall be mounted on top of the illumination cabinet (4.3) at zero degrees to the normal with respect to the tested specimen. The camera mounting shall allow adjustment of the camera lens position to allow parallel alignment to the specimen assessment area.The height of the camera above the assessm
42、ent area is such that it will accommodate the required focal length of the lens and capture the whole of the defined assessment area within the image.4.2.3 Camera verification4.2.3.1 GeneralThe function of the camera verification is to verify the camera output for each pixel in an image in terms of
43、CIE XYZ data. The verification is then applied to all subsequent images used for digital grading. The camera calibration is done using a digital verification chart as described in Annex C.4.2.3.2 Verification intervalThe camera shall be verified at system start-up, if the camera settings are changed
44、, and at the manufacturers recommended verification time interval.4.2.3.3 Verification timeThe time and date of the current verification shall be recorded in the system software and be accessible to the user. The system software shall indicate to the user when the recommended verification period has
45、 expired.4.2.3.4 Verification performanceThe verification performance of the digital method is expressed in terms of repeatability and accuracy. The results shall be expressed in terms of the median and maximum CIEDE2000 colour difference between the known and measured values of the digital verifica
46、tion chart. The procedures to conduct these tests are described below.The system software shall store a summary of the verification performance for the current verification such that it is easily retrievable by the user. ISO 2012 All rights reserved 3BS EN ISO 105-A11:2012ISO 105-A11:2012(E)4.2.3.5
47、Accuracy testThe digital imaging apparatus (4.2) shall be verified within the time period as specified by the manufacturer or at 8 hourly intervals, whichever is sooner.For each colour patch in the verification chart, the CIEDE2000 colour difference value shall be calculated between the prediction f
48、rom the digital method and the measurement from a spectrophotometer which has been calibrated with white tiles (3.4) certified as traceable to a national standard, such as the National Physical Laboratory in the UK.The median and maximum CIEDE2000 colour difference values shall be recorded in the sy
49、stem to represent the accuracy performance.The accuracy shall be deemed satisfactory if CIEDE2000 maximum is less than 5,0, and CIEDE2000 median is less than 1,0.4.2.3.6 Repeatability testThe repeatability test shall be carried out at frequent intervals in accordance with the manufacturers instructions.Ten consecutive measurements of the verification chart shall be as defined in Annex C. All colour patches used in the verification routine shall be measured and recorded by the system.The
