1、BRITISH STANDARD BS ISO 18905:2002 Imaging materials Ammonia-processed diazo photographic film Specifications for stability ICS 37.040.20 BS ISO 18905:2002 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Policy and Strategy Committee, was
2、published under the authority of the Standards Policy and Strategy Committee on 4 November 2002 BSI 4 November 2002 ISBN 0 580 40680 6 National foreword This British Standard reproduces verbatim ISO 18905:2002 and implements it as the UK national standard. It supersedes BS ISO 8225:1995 which is wit
3、hdrawn. 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 which implement interna
4、tional publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include
5、 all the necessary provisions of a contract. Users are responsible for its 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/European committee any enquirie
6、s 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 page, pages ii to v, a blank page,
7、 pages 1 to 18, 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 Comments Reference number ISO 18905:2002(E)INTERNATIONAL STANDARD ISO 18905 First edition 2002-11-01
8、 Imaging materials Ammonia-processed diazo photographic film Specifications for stability Matriaux pour limage Film photographique diazoque trait lammoniac Spcifications relatives la stabilit BSISO18905:2002 ii BSISO18905:2002 iiiContents Page Foreword iv Introduction. v 1 Scope 1 2 Normative refere
9、nces 1 3 Terms and definitions. 1 4 Film base requirements 3 5 Processed film requirements. 3 5.1 Safety film 3 5.2 Tensile properties and loss in tensile properties 3 6 Requirements for the emulsion and backing layers of processed film. 4 6.1 Layer adhesion 4 6.2 Blocking. 4 6.3 Binder stability 4
10、6.4 Thermal sticking 4 7 Image stability requirements. 4 7.1 Proper development 4 7.2 Light-fading 5 7.3 Dark-ageing 5 8 Test methods. 5 8.1 Identification of film base. 5 8.2 Accelerated-ageing conditions 6 8.3 Tensile property test for processed film. 6 8.4 Tape-stripping adhesion test . 7 8.5 Hum
11、idity-cycling adhesion test . 7 8.6 Blocking test 8 8.7 Thermal sticking test 9 9 Image test methods. 9 9.1 Densitometry. 9 9.2 Proper development test 9 9.3 Light-fading test 9 9.4 Dark-ageing test 10 10 Classification for reporting 10 Annex A (informative) Numbering system for related Internationa
12、l Standards. 11 Annex B (informative) Distinction between film storage (record) copies and work (reference) copies 13 Annex C (informative) Microfilm image quality 14 Annex D (informative) Light-fading of diazo images. 16 Bibliography 17 BSISO18905:2002iv Foreword ISO (the International Organization
13、 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 committee has been established has
14、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 electrotechnical standardization. Intern
15、ational Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publicati
16、on 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 International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all suc
17、h patent rights. ISO 18905 was prepared by Technical Committee ISO/TC 42, Photography. ISO 18905 cancels and replaces ISO 8225:1995, of which it constitutes a technical revision. This International Standard is one of a series of International Standards dealing with the physical properties and stabil
18、ity 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. BSISO18905:2002 vIntroduction Since 1930, great advances have
19、 been made in the use of photographic films for the preservation of records. The preservation of records on film by national, state and municipal governments, by banks, insurance companies, industry and other enterprises has been stimulated by recognition of the resultant economies in storage space,
20、 organization, accessibility and ease of reproduction. The safe-keeping of pictorial film records having legal, scientific, industrial, medical, historical, military or other values has also become increasingly important. The use of film for records having long-term values necessitated the developme
21、nt of International Standards to specify the characteristics of film suitable for this purpose. ISO 18901 specifies the requirements for silver-gelatin films which are suitable for storage. This International Standard (for diazo film) and ISO 18912 (for vesicular film) give the requirements for phot
22、ographic duplicate films suitable for storage. The term “archival film” has been discontinued and the new concept of “life expectancy” is introduced. Film life is classified by the LE or life expectancy rating as defined in this International Standard. For example, LE-100 represents film with a life
23、 expectancy of 100 years when stored at 21 C and 50 % RH. Criteria for properties of LE-10 and LE-100 diazo films are based upon the dark-ageing stability of diazo images. Different dark-incubation tests are specified for LE-10 and LE-100 films. All other properties and processing requirements for m
24、edium and long-term diazo films are identical. It is recognized that diazo images may show density changes after exposure to light. However, this International Standard covers only films used as storage copies, not as work copies (as defined in annex B). The light-fading requirements specified in th
25、is International Standard ensure satisfactory behaviour for storage copies that are not intended to be subjected to frequent light exposure. In addition to the characterization of films with respect to their expected storage life, diazo films are also separated into two classes (A and B) which are d
26、ependent upon their intended use. Class A films are those which retain density in both the visual and actinic region (printing) after storage. Such films can be viewed directly or reprinted onto ultraviolet (UV)-sensitive materials. However, some diazo films are not intended to be reprinted onto UV-
27、 sensitive materials and require only visual capabilities after storage. Such films are designated as Class B films. Obviously, both Class A and Class B films can faIl into the LE-10 and LE-100 categories. The requirements for Class A and Class B films are identical, with the exception of image-stab
28、ility tests after dark-ageing and after light-fading. Everyone concerned with the preservation of records on photographic film should realize that specifying the chemical and physical characteristics of the material does not, by itself, assure satisfactory behaviour. It is also essential to provide
29、the correct storage temperature and humidity, as well as protection from the hazards of fire, water, light and certain atmospheric pollutants. Conditions for the storage of record films are specified in ISO 18902 and ISO 18911. BSISO18905:2002INTENRATIONAL TSANDADR IS:50981 O2002(E)1Imaging material
30、s Ammonia-processed diazo photographic film Specifications for stability 1 Scope This International Standard establishes specifications for the stability of polyester-base safety film which has an ammonia-processed diazo photographic image. It is applicable only to diazo photographic films intended
31、for and used as LE-10 and LE-100 storage copies, which shall be stored in accordance with ISO 18902 and ISO 18911. This document characterizes only the inherent keeping behaviour of the film. However, the suitability of a film record after extended storage depends on both the inherent ageing charact
32、eristics of the film and the original image quality. The latter is discussed in annex C. This International Standard is applicable to photographic film in which the image layer is a discrete layer attached to a transparent support, and it applies to roll film and sheet film. This International Stand
33、ard is not applicable to diazo film records intended and used as “work” or “use” copies as discussed in annex B. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated referenc
34、es, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated refere
35、nces, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 5-2:2001, Photography Density measurements Part 2: Geometric conditions for transmission density ISO 5-3:1995, Photography Density measure
36、ments Part 3: Spectral conditions ISO 527-3:1995, Plastics Determination of tensile properties Part 3: Test conditions for films and sheets ISO 18902:2001, Imaging materials Processed photographic films, plates and papers Filing enclosures and storage containers ISO 18906:2000, Imaging materials Pho
37、tographic films Specifications for safety film ISO 18907:2000, Imaging materials Photographic films and papers Wedge test for brittleness ISO 18911:2000, Imaging materials Processed safety photographic films Storage practices 3 Terms and definitions For the purposes of this International Standard, t
38、he following terms and definitions apply. BSISO18905:20022 3.1 archival medium recording material that can be expected to retain information forever so that such information can be retrieved without significant loss when properly stored NOTE There is, however, no such material and it is not a term t
39、o be used in International Standards or system specifications. 3.2 blocking sticking together of similar or dissimilar materials in physical contact 3.3 Class A films films which are usable both visually and for printing onto ultraviolet-sensitive materials 3.4 Class B films films which are usable v
40、isually but do not have any density requirements for printing onto ultraviolet-sensitive materials 3.5 density optical degree of light absorption, reflection or scattering characteristics of a photographic image, expressed as the logarithm to the base 10 of the ratio of incident radiant flux to the
41、transmitted, reflected or scattered flux NOTE See ISO 5-3. 3.5.1 printing density optical density in which the incident radiant flux has the same spectral energy distribution as the printer light source and the transmitted density is evaluated by a receiver having the same spectral response as the p
42、rint material 3.5.2 projection density optical density of a processed photographic image in which the angular distributions of the incident and transmitted radiant flux are equal and specified NOTE For microfilm applications, the angular distribution is a nominal half-angle of 6,4 o , which correspo
43、nds to an f-number of f /4,5 and simulates a microfilm reader. 3.5.3 visual density optical density of a processed photographic image in which the incident radiant flux has a spectral energy distribution as defined in ISO 5-3, and the transmitted or reflected flux is evaluated by the human eye or by
44、 a receiver having the same spectral receiver as the human eye 3.6 emulsion layer(s) image or image-forming layers(s) of photographic films, papers, and plates 3.7 extended-term storage conditions storage conditions suitable for the preservation of recorded information having permanent value 3.8 fil
45、m base plastic support for the emulsion and backing layers BSISO18905:2002 33.9 LE designation rating for the “life expectancy” of recording materials and associated retrieval systems NOTE The number following the LE symbol is a prediction of the minimum life expectancy in years for which informatio
46、n can be retrieved without significant loss when stored at 21 C and 50 % RH, e.g. LE-100 indicates that information can be retrieved after at least 100 years storage. 3.10 life expectancy LE length of time that information is predicted to be acceptable in a system after dark storage at 23 C and 50 %
47、 RH 3.11 medium-term storage conditions storage conditions suitable for the preservation of recorded information for a minimum of 10 years 3.12 polyester base base for recording materials composed mainly of a polymer of ethylene glycol and terephthalic acid (also referred to as polyethylene terephth
48、alate), or a polymer of ethylene glycol and 2,6 naphthalene dicarboxylic acid (also referred to as polyethylene naphthalate) 3.13 poly (ethylene terephthalate) base polyester base for recording materials composed mainly of a polymer of ethylene glycol and terephthalic acid 3.14 safety photographic f
49、ilm photographic film which passes the ignition-time test and burning-time test specified in ISO 18906 4 Film base requirements The base used for record films, as specified in this International Standard, shall be of a safety polyester type and can be identified by the method described in 8.1. Films can have a maximum LE rating of 500. 5 Processed film requirements 5.1 Safety film Film shall meet the requirements specified in ISO 18906. 5.2 Ten
