1、BRITISH STANDARD BS ISO 18906:2000 Imaging materials Photographic films Specifications for safety film ICS 37.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS ISO 18906:2000 This British Standard, having been prepared under the direction of the Consumer Products and Se
2、rvices Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 BSI 03-2001 ISBN 0 580 37030 5 National foreword This British Standard reproduces verbatim ISO 18906:2000 and implements it as the UK national standard. It supersedes BS ISO 5
3、43:1990 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CPW/42, Photography, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards whi
4、ch implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport t
5、o include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international
6、/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title pa
7、ge, pages ii to v, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsReference number ISO 18906:2000(E) INTERNATIONAL STANDARD ISO
8、 18906 First edition 2000-12-15 Imaging materials Photographic films Specifications for safety film Matriaux pour image Films photographiques Spcifications pour le film de scuritISO 18906:2000(E) ii ISO 18906:2000(E)iii Contents Page Foreword.iv Introduction.v 1 Scope 1 2 Term and definition .1 3 Pr
9、operty requirements 1 4 Ignition time test 2 5 Burning time test .2 Annex A (informative) Numbering system for related International Standards4 Annex B (informative) Field test 6 Annex C (informative) Marking 7 Annex D (informative) Float test 8 Figure 1 Burning time test specimen (not to scale).3IS
10、O 18906:2000(E) iv Foreword ISO (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 su
11、bject 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 (
12、IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter
13、national 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 International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent right
14、s. International Standard ISO 18906 was prepared by Technical Committee ISO/TC 42, Photography. This first edition cancels and replaces the second edition of ISO 543:1990, of which it constitutes a minor revision. This International Standard is one of a series of International Standards dealing with
15、 the physical properties and stability of imaging materials. To facilitate identification of these International Standards, they are assigned a number within the block from 18900 18999 (see annex A). Annexes A to D of this International Standard are for information only.ISO 18906:2000(E)v Introducti
16、on Although the manufacture of films not complying with this International Standard is currently very rare, if it takes place at all, there remains a great amount of such films stored in archives and libraries. Due to the risk of ignition caused by careless handling, of self-ignition after long and
17、adverse storage conditions, or rapid burning characteristics, it is necessary to provide film owners with a method of determining whether their film is “safety photographic film“. That is the objective of this International Standard.INTERNATIONAL STANDARD ISO 18906:2000(E)1 Imaging materials Photogr
18、aphic films Specifications for safety film 1 Scope This International Standard provides specifications and test procedures for establishing the safety of photographic films with respect to hazards from fire. The specifications are applicable to both unprocessed and processed 1) films on any type of
19、currently known plastic support. These specifications cover silver films (both gelatin and non-gelatin types), colour films, diazo films, vesicular films, and striped or full-width magnetic films. Magnetic tapes and video recording tapes are excluded. A field test for burning behaviour is described
20、in informative annex B, and methods of marking film are defined in informative annex C. A simple test to distinguish non-safety nitrate-base film from cellulose ester and polyester- base film is given in informative annex D. 2 Term and definition For the purposes of this International Standard, the
21、following term and definition applies. 2.1 safety photographic film photographic film which passes the ignition time test and burning time test as specified in this International Standard 3 Property requirements 3.1 Ignition time Photographic films are classified as having passed the ignition time t
22、est when the ignition time is not less than 10 min when tested as specified in clause 4. 3.2 Burning time Photographic films having a thickness equal to or greater than 0,08 mm are classified as having passed the burning time test when the burning time is greater than 45 s when tested as specified i
23、n clause 5. Photographic films having a thickness less than 0,08 mm are classified as having passed the burning time test when the burning time is greater than 30 s. 1) Normally, unprocessed and processed films have the same safety characteristics, so either one may be tested for conformance to thes
24、e specifications. If an additional treatment, such as a lacquer coating, has been applied after processing, the safety characteristics may or may not be affected. In case of doubt, both unprocessed and processed films must be tested.ISO 18906:2000(E) 2 4 Ignition time test 4.1 Apparatus 4.1.1 Electr
25、ic resistance oven, the interior of which is a cavity of appropriate size to hold the film specimen and an instrument for measuring the temperature (4.1.2) in the centre of the cavity. The top of the oven shall be closed by means of a closely overlapping lid having two holes of diameter approximatel
26、y 7 mm and 15 mm respectively, the centres being at a distance of about 15 mm from each other. 4.1.2 Thermocouple, having connecting wires with an insulated coating fitting tightly into the smaller hole of the lid of the oven (4.1.1). Alternatively, the temperature in the cavity may be measured by m
27、eans of other temperature measuring instruments such as a mercury thermometer fitted into the smaller hole, protected from the rising heat by means of a cork disc lying above the lid. 4.2 Specimens Cut three specimens 35 mm long and 8 mm wide from the film to be tested. Specimens shall be free from
28、perforations as far as is practicable. 4.3 Procedure Bring the oven to (300 10) o C and maintain it at this temperature. When this temperature is reached, attach the specimen to a thin U-shaped wire hook and introduce it through the larger opening in the lid of the oven. Fix the instrument for measu
29、ring the temperature (4.1.2) and the specimen in such a way that the thermojunction (or mercury bulb) and the centre of the specimen are at an equal depth of approximately 35 mm. Record the time interval from the insertion of the specimen to the ignition time of the specimen as the ignition time. Te
30、st the three specimens. Before each measurement, thoroughly air the oven. 4.4 Expression of results If any one of the three specimens does not meet the ignition time requirement, the material is considered to have failed the test. 5 Burning time test 5.1 Specimens Cut three specimens each 400 mm lon
31、g and 35 mm wide from the film to be tested. If only films narrower than 35 mm are available, specimens 400 mm long and of full width may be tested 2) . Mark each specimen at a point 50 mm from each end. If the specimens are not already perforated, perforate them with holes approximately 3 mm in dia
32、meter along one edge, at intervals of not more than 20 mm. 2) Photographic films, when tested by this method, have similar flame propagation characteristics and approximately the same burning times, regardless of whether the width of the samples tested is 35 mm or less.ISO 18906:2000(E)3 If a contin
33、uous strip 400 mm long cannot be obtained from the film being tested, shorter lengths may be stapled together with a 1 mm to 2 mm overlap to give the required length. Thread a wire having a diameter of not more than 0,5 mm through the perforations on one side so that the specimen is supported at poi
34、nts not more than 20 mm apart. Though no conditioning other than the normal room temperature is required, the film shall be dry to the touch. 5.2 Procedure Carry out the test in a room free from draughts. With the wire stretched horizontally and the specimen hanging vertically from it, ignite the bo
35、ttom of one end (see Figure 1). Record the time that elapses from the moment the flame reached the first mark until the time it reaches the second mark as the burning time. Test the three specimens. 5.3 Expression of results If the specimen does not ignite or if the flame does not reach the second m
36、ark within the stipulated time, classify the film as having passed the burning time test. If any one of the three specimens does not pass the burning time test, the material is considered to have failed. Dimensions in millimetres Key 1W i r e Figure 1 Burning time test specimen (not to scale)ISO 189
37、06:2000(E) 4 Annex A (informative) Numbering system for related International Standards The current numbering system for TC 42 documents dealing with the physical properties and stability of imaging materials is confusing since the five digit numbers that are used are not in any consecutive order. T
38、o facilitate remembering the numbers, ISO has set aside a block of numbers from 18900 to 18999 and all revisions and new International Standards will be given a number within this block. The last three digits will be identical to the current ANSI/PIMA numbers of published documents. This will be adv
39、antageous to the technical experts from Germany, Japan, United Kingdom and the USA who have prepared the standard and who are familiar with the ANSI/PIMA numbers. As the current International Standards are revised and published, their new numbers will be as given in Table A.1. Table A.1 New ISO numb
40、ers Current or former ISO number Title New ISO number 10602 Photography Processed silver-gelatin type black-and-white film Specifications for stability 18901 10214 Photography Processed photographic materials Filing enclosures for storage 18902 6221 Photography Films and papers Determination of dime
41、nsional change 18903 5769 Photography Processed films Method for determining lubrication 18904 8225 Photography Ammonia-processed diazo photographic film Specifications for stability 18905 543 Photography Photographic films Specifications for safety film 18906 6077 Photography Photographic films and
42、 papers Wedge test for brittleness 18907 8776 Photography Photographic film Determination of folding endurance 18908 10977 Photography Processed photographic colour films and paper prints Methods for measuring image stability 18909 4330 Photography Determination of the curl of photographic film and
43、paper 18910 5466 Photography Processed safety photographic films Storage practices 18911 9718 Photography Processed vesicular photographic film Specifications for stability 18912 12206 Photography Methods for the evaluation of the effectiveness of chemical conversion of silver images against oxidati
44、on 18915 14523 Photography Processed photographic materials Photographic activity test for enclosure materials 18916 417 Photography Determination of residual thiosulfate and other related chemicals in processed photographic materials Methods using iodine- amylose, methylene blue and silver sulfide
45、18917 3897 Photography Processed photographic plates Storage practices 18918ISO 18906:2000(E)5 Table A.1 (continued) Current or former ISO number Title New ISO number 14806 Photography Thermally processed silver (TPS) microfilm Specifications for stability 18919 6051 Photography Processed reflection
46、 prints Storage practices 18920 15524 Photography Polyester-base magnetic tape Storage practices 18923 15640 Photography Imaging materials Test method for Arrhenius-type predictions 18924ISO 18906:2000(E) 6 Annex B (informative) Field test B.1 Principle The following test method may be used for quic
47、kly identifying whether most photographic films are of the safety or the nitrate variety, without technical equipment or the expenditure of large amounts of specimen film. However, this test does not determine compliance of a film with this International Standard. Anyone unfamiliar with the burning
48、of safety and nitrate photographic films should first conduct this test on samples of both types of film, the identities of which are known. B.2 Specimen Cut a piece of film approximately 16 mm wide and 35 mm long. Bend the film lengthwise and crease it sufficiently so that when released it will sta
49、nd upright. B.3 Procedure Stand the specimen (with the crease vertical) on a flat fireproof surface, such as an ashtray, glass plate, concrete floor, etc. WARNING This must be done at a safe distance from all film stocks. With a match flame, ignite one of the top corners of the film. B.4 Expression of results If the specimen ignites easily, burns downward rapidly and vigorously with a bright yellow flame, and is completely consumed in less than 15 s, the film probably contains d
