BS ISO 18946-2012 Imaging materials Reflection colour photographic prints Method for testing humidity fastness《成像材料 彩色反射摄影印相 测定耐潮湿牢度的方法》.pdf
《BS ISO 18946-2012 Imaging materials Reflection colour photographic prints Method for testing humidity fastness《成像材料 彩色反射摄影印相 测定耐潮湿牢度的方法》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 18946-2012 Imaging materials Reflection colour photographic prints Method for testing humidity fastness《成像材料 彩色反射摄影印相 测定耐潮湿牢度的方法》.pdf(24页珍藏版)》请在麦多课文档分享上搜索。
1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 18946:2011Imaging materials Reflectioncolour photographic prints Method for testing humidityfastnessBS ISO 18946:2011 BRITISH STANDARDNational forewordThis British Standar
2、d is the UK implementation of ISO 18946:2011.The UK participation in its preparation was entrusted to TechnicalCommittee CPW/42, Photography.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessary
3、provisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012ISBN 978 0 580 62292 2ICS 37.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards
4、 Policy and Strategy Committee on 31 January 2012.Amendments issued since publicationDate Text affectedBS ISO 18946:2011Imaging materials Reflection colour photographic prints Method for testing humidity fastnessMatriaux pour limage Tirages photographiques en couleurs par rflexion Mthode dessai de l
5、a solidit lhumidit ISO 2011Reference numberISO 18946:2011(E)First edition2011-12-15ISO18946INTERNATIONAL STANDARDBS ISO 18946:2011ISO 18946:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any fo
6、rm or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E
7、-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerlandii ISO 2011 All rights reservedBS ISO 18946:2011ISO 18946:2011(E) ISO 2011 All rights reserved iiiContents PageForeword .vIntroduction .vi1 Scope 12 Normative references .13 Terms and definitions .14 Requirements .25 Outline of test proced
8、ure 26 Sample preparation .36.1 General .36.2 Test target 46.3 Printer driver setting .56.4 Printing conditions56.5 Sample conditioning .57 Humidity exposure 67.1 Equipment and calibration 67.2 Test environment control 67.3 Method A Fixed humidity condition 77.4 Method B Multiple humidity conditions
9、 .77.5 Method C Fixed low-humidity condition 78 Colorimetric measurement .79 Data analysis 810 Test report .910.1 General .910.2 Samples information 910.3 Test conditions .910.4 Results .9Annex A (informative) Correspondence to psychophysical evaluation 11Bibliography .12BS ISO 18946:2011ForewordISO
10、 (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 for which a technical com
11、mittee 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) on all matters of electrot
12、echnical 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 are circulated to the membe
13、r 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 responsible for identifying
14、 any or all such patent rights.ISO 18946 was prepared by Technical Committee ISO/TC 42, Photography.ISO 18946:2011(E)iv ISO 2011 All rights reservedBS ISO 18946:2011IntroductionThis International Standard addresses the methods and procedures for testing the humidity fastness of reflection colour pho
15、tographic prints. Low and high humidity exposure are covered. This is of particular relevance to dye-based ink-jet prints or dye diffusion process prints10111213141516.Some types of colour photographic print suffer from changes in image appearance when exposed to a high relative humidity environment
16、. The observed changes relate to colour, tone and loss of sharpness caused by horizontal and vertical diffusion of colorants as a result of exposure to elevated humidity.The elevated humidity can arise from:a) exposure to high relative humidity of the environment of the display area or storage space
17、;b) trapped moisture as a result of stacking prints, or inserting them into albums, in a high relative humidity environment;c) trapped moisture as a result of stacking prints, or inserting them into albums, before sufficient dry time has elapsed.Therefore, humidity based on meteorological data and u
18、sers behaviour was considered in determining the appropriate test conditions for the humidity fastness test. The test method stipulated in this International Standard is validated for case a).Image deterioration of dye-based prints caused by high humidity is often detectable by the following charact
19、eristics. Blur (sharpness loss), change of colour and/or tone is observed. The deterioration is observed in higher humidity, commonly over 80 %RH or over 90 %RH. The deterioration can occur in a relatively short time, even within one or two weeks. Higher density images, or images that contain more s
20、econdary or mixed colours, are generally more affected. The largest change is usually observed at the boundary of different colours, or with images that have contrasting background colours. The size of the higher density area also affects the deterioration because the solvent and water of the ink di
21、ffuses to the adjacent lower density area when the higher density area is small.It is important to take into account these characteristics when determining the appropriate test chart and test conditions.It has also been observed that low relative humidities can accelerate the yellowing of certain ty
22、pes of inkjet papers. Indoor low humidities are common in colder climates as a result of heating air drawn in from the outdoors with very low dew points, and also in hot, dry climates in combination with air conditioning. In addition to Dminyellowing, very low humidities have also been shown to caus
23、e physical degradation to image-receiving layers; this phenomenon is outside the scope of this International Standard.This International Standard makes use of a checkerboard pattern that allows assessment of humidity-induced blur by means of a relatively simple colorimetric measurement11.ISO 18946:2
24、011(E) ISO 2011 All rights reserved vBS ISO 18946:2011BS ISO 18946:2011INTERNATIONAL STANDARD ISO 18946:2011(E)Imaging materials Reflection colour photographic prints Method for testing humidity fastness1 ScopeThis International Standard describes test methods for evaluating reflection colour photog
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