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1、BRITISH STANDARD BS ISO 11628:1995 Implementation of ISO 11628:1995 Graphic technology Prints and printing inks Determination of resistance of prints to acids Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 11628:1995 This British Sta
2、ndard, 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 15 October 1995 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference PAI/36
3、Draft for comment 93/313986 DC ISBN 0 580 24789 9 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PAI/36, Printing inks, upon which the following bodies were represented: British Coatings Federation Ltd. British Printing
4、Industries Federation Flexible Packaging Association Graphical Paper and Media Union (GPMU) Her Majestys Stationery Office London College of Printing Metal Packaging Manufacturers Association PICON Pira International Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun
5、 sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 11628:1995 BSI 01-2000i Contents Page Committees responsibleInside front cover National forewordii Forewordiii Text of ISO 116281 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Un
6、controlled Copy, (c) BSI BS ISO 11628:1995 ii BSI 01-2000 National foreword This British Standard reproduces verbatim ISO 11628:1995 and implements it as the UK national standard. This British Standard is published under the direction of the Sector Board for Materials and Chemicals whose Technical C
7、ommittee PAI/36 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in
8、 the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible fo
9、r their correct application. 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, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 3 and a back cover. This standard h
10、as been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, n
11、a, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11628:1995(E) ii BSI 01-2000 Contents Page Forewordiii Introduction1 1Scope1 2Normative reference1 3Definition1 4Principle1 5Apparatus and reagents1 6Environmental conditions1 7Test procedure1 8Evaluation2 9Test report2 Annex A (i
12、nformative) Recommended acid solutions3 Table A.13 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11628:1995(E) BSI 01-2000iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national stand
13、ards 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 committee has been established has the right to be represented on that committee. International orga
14、nizations, 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 electrotechnical standardization. Draft International Standards adopted by the technical committees are c
15、irculated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 11628 was prepared by Technical Committee ISO/TC 130, Graphic technology. Annex A of this International Standard is f
16、or information only. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11628:1995(E) BSI 01-20001 Introduction This Interna
17、tional Standard is in technical conformity with CEI specification 18-77 of the European Committee of the Paint and Printing Manufacturers Associations. 1 Scope This International Standard specifies a method for assessing the resistance of prints to acids. It is applicable to all printing processes a
18、nd all printing substrates such as paper, board, plastics and metals (thin metal sheets and plate). 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition in
19、dicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid Int
20、ernational Standards. ISO 105-A03:1993, Textiles Tests for colour fastness Part A03: Grey scale for assessing staining. 3 Definition For the purposes of this International Standard, the following definition applies. 3.1 resistance of prints to acids resistance of a print to a particular acid in a pa
21、rticular concentration over a given period of time NOTE 1A print is estimated to be resistant to the acid when no significant change under the test conditions is observed. 4 Principle The print is pressed between two sheets of filter paper previously wetted by a solution of the relevant acid. An ass
22、essment is made of any changes to the print and any bleeding of the colour onto the filter paper. NOTE 2The type and concentration of the acid and the duration of exposure are not standardized, but should be chosen according to the intended application of the print. Annex A gives a list of commonly
23、used types, concentrations and exposure durations. NOTE 3The test sample includes both printing ink and substrate, because resistance may be affected by ink, substrate or the interaction between them. Test samples may be taken from existing printed material, or may be prepared to be representative o
24、f a planned printed product. 5 Apparatus and reagents 5.1 White laboratory filter paper, for chemical analysis, with a very smooth and soft surface. The size of the strips of filter paper should be 60 mm 90 mm. 5.2 Reference and test samples 5.3 Acid, to be used for the test. 5.4 Glass plates, 60 mm
25、 90 mm. 5.5 Grey scale for colour evaluation, (see ISO 105-A03). 5.6 Distilled water 5.7 1 kg weight 5.8 Oven, capable of being controlled at (50 2) C. 6 Environmental conditions The test should be conducted at a standard temperature. NOTE 4According to common laboratory practice, this temperature c
26、an be 20 C, 23 C, or 27 C, depending on the climate where the print is used. 7 Test procedure Immerse two sheets of filter paper to be used for the test totally in the acid being tested and then drain them until no free solution drips from the filter paper. Place one of the sheets of filter paper on
27、 the lower glass plate. Place a 20 mm 50 mm sample of the print to be evaluated on the filter paper and cover it with the second piece of filter paper. Place the upper glass plate on top and place the whole in a moisture-tight wrapper or container. Place a 1 kg load on the glass plates to provide pr
28、essure. After exposing the print to the test acid for the chosen duration (see Table A.1), remove it and rinse it in distilled water until a neutral pH is achieved. Dry the print in the oven at (50 2) C for 30 min. Dry the sheets of filter paper used for the test in free air. Do not rinse them befor
29、e examining them. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11628:1995(E) 2 BSI 01-2000 8 Evaluation Compare the dried print with an unexposed reference print and examine the filter paper. The results shall be evaluated in accordan
30、ce with the following: 1) If the print has changed significantly in appearance it shall not be considered to be acid resistant. 2) If the appearance of the print has not changed but the filter paper shows staining, this shall be reported and evaluated as to intensity. The print is deemed to have ble
31、d when the stain on the filter paper reaches step 4 of the grey scale (see ISO 105-A03). 9 Test report The test report shall include the following information: a) a reference to this International Standard; b) the acid used for the test; c) the concentration of the acid in the test solution; d) the
32、room temperature and the temperature of the test solution; e) the duration of exposure used for the test; f) whether or not the colour of the test print has changed, and if so, the description of the changes observed. The colour changes attributable to the substrate must be taken into account and st
33、ated clearly; g) whether or not the filter paper in contact with the test print has become stained; h) whether or not any changes have occurred on the whole test print, with their description; NOTE 5Certain test prints are not acid resistant in accordance with this International Standard. In many ca
34、ses, they can however still be satisfactory in use even though a slight staining of the filter. Their various degrees of bleeding can be evaluated by comparison with the grey scale. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11628:1
35、995(E) BSI 01-20003 Annex A (informative) Recommended acid solutions The recommended concentrations and durations of exposure for testing the resistance of prints to the most commonly used acids are given in Table A.1. NOTE 6These recommended acids, concentrations and durations of exposure should on
36、ly be used when no other guidelines concerning acids and test conditions are given. Table A.1 Acids Concentration Duration of exposure Typical products for which testing of acid resistance can replace testing of resistance against the product itself% (V/V) Lactic acid1) or 2) 10 5 1 h 24 h Cheese an
37、d cheese products Citric acid1) or 2) 5 1 1 h 24 h Juices of citric fruits Acetic acid1) or 2) 5 1 30 min 24 h Hydrochloric acid1) or 2) 5 1 10 min 24 h Products with a pH-value 2 Sulfuric acid1) or 2) 5 1 10 min 24 h Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:33:31 GMT+00:00 2006, Un
38、controlled Copy, (c) BSI BS ISO 11628:1995 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by
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