1、BRITISH STANDARD BS ISO 3023:1995 Implementation of ISO 3023:1995 Cinematography 65mm and 70 mm unexposed motion-picture film Cutting and perforating dimensionsBSISO3023:1995 This British Standard, having been prepared under the directionof the Consumer Products and Services SectorBoard, was publish
2、edunderthe authorityofthe StandardsBoardand comes intoeffect on 15October1995 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference CPM/1 Draft for comment 94/304655 DC ISBN 0 580 24802 X Committees responsible for this British Standard The preparation of
3、this British Standard was entrusted by Technical Committee CPM/1, Film, Laboratory Services and Film/Electronic Interface Technology, upon which the following bodies were represented: British Broadcasting Corporation British Film Institute British Kinematograph, Sound and Television Society Broadcas
4、ting Entertainment Cinematrograph and Theatre Union Cinema Exhibitors Association Home Office Institute of Amateur Cinematographers ITV Association (ITVA) Amendments issued since publication Amd. No. Date CommentsBSISO3023:1995 BSI 11-1999 i Contents Page Committees responsible Inside front cover Na
5、tional foreword ii Foreword iii Text of ISO 3023 1BSISO3023:1995 ii BSI 11-1999 National foreword This British Standard reproduces verbatim ISO3023:1995 and implements it as the UK national standard. It supersedes BS5550-4.1.1:1978 which is withdrawn. This British Standard is published under the dir
6、ection of the Consumer Products and Services Sector Board whose Technical Committee CPM/1 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; moni
7、tor related international and European developments and promulgate them in 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 necessa
8、ry 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. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO t
9、itle page, pages ii to iv, pages 1 to 3 and abackcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.ISO3023:1995(E) ii BSI 11-1999 Contents Page Foreword iii 1 Scope 1 2 Normativ
10、e reference 1 3 Dimensions 1 Annex A (informative) Additional data 3 Figure 1 65 mm and 70 mm unexposed film 1 Table 1 2 Table A.1 3ISO3023:1995(E) BSI 11-1999 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bod
11、ies). 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 organizations, governmental and
12、 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 circulated to the member bod
13、ies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO3023 was prepared by Technical Committee ISO/TC36, Cinematography. This fourth edition, cancels and replaces the third edition (ISO3023:1988), of w
14、hich it constitutes a technical revision. Annex A of this International Standard is for information only.iv blankISO3023:1995(E) BSI 11-1999 1 1 Scope This International Standard specifies the cutting and perforating dimensions for unexposed65mm and70mm motion-picture film. This International Standa
15、rd applies to safety raw stock film as described in ISO543. 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 indicated was valid. All standards are sub
16、ject 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 International Standards. ISO 543:1990, Phot
17、ography Photographic films Specifications for safety film. 3 Dimensions The dimensions and tolerances shall be as shown inFigure 1 and given inTable 1 (in millimetres). They apply to safety raw stock film, as defined in ISO543, at the time of cutting and perforating, for film adjusted to a temperatu
18、re of23 C 1 C and a relative humidity of (50 2)%. The manufacturer may indicate other nominal temperature and humidity conditions under which the dimensions apply. NOTE 1The65mm width is usually used for negative films and is not intended to be used in projectors. Figure 1 65 mm and 70 mm unexposed
19、filmISO3023:1995(E) 2 BSI 11-1999 Table 1 Dimensions in millimetres Dimension 65 mm film 70 mm film A 64,97 0,05 69,95 0,05 B 4,750 0,010 B 4,740 0,010 L 475,0 0,4 L 474,0 0,4 C 2,800 2,800 D 1,980 0,010 1,980 0,010 E 2,97 0,05 5,46 0,05 F 56,24 0,08 56,24 0,08 G 0,025 max. 0,025 max. R 0,51 0,03 0,
20、51 0,03 NOTE 1All dimensions given in imperial units are shown inAnnex A (seeTable A.1). In some instances, the values of the metric dimensions are not exact conversions of the inch dimensions. NOTE 2Dimensions B and L (short perforation pitch) are provided to fulfil the requirements of continuous s
21、procket contact printing. NOTE 3Dimensions L and L represent the length of any100 consecutive perforation intervals. NOTE 4Dimension C in metric units has non-symmetrical tolerances for convenience. NOTE 5The dimension and tolerances of E apply to both edges of the film. NOTE 6There are many dimensi
22、ons in the table for which the tolerances of the parts are limited by other tolerances, and wherethis occurs, the sum of the individual tolerances should be less than the overall variation series. +0,005 0,015 +0,005 0,015ISO3023:1995(E) BSI 11-1999 3 Annex A (informative) Additional data A.1 Unifor
23、mity of perforating The uniformity of pitch, hole size and margin (dimensions B or B, C and D, and E) are important variables affecting image steadiness. Variations in these dimensions within a roll from one perforation to the next are more significant than variations from roll to roll. In fact, it
24、is the maximum variation from one perforation to the next within any small group of consecutive perforations that is the most important variable. A.2 Dimensional stability The user is reminded that film dimensions can change due to moisture, temperature and strain effect or, in some film base materi
25、als, due to solvent or plasticizer loss. These changes are generally uniform throughout the roll. A.3 Definition of low-shrinkage film Low-shrinkage film is film which shrinks no more than0,2% from its original dimensions at the time of cutting and perforating, after the film has been a) kept in the
26、 manufacturers normal commercial packing for six months at recommended storage conditions; b) exposed; c) processed and dried as recommended by the manufacturer; d) stored in roll form, exposed to air, for a period not exceeding30 days at18 C to24 C and50% to60% relative humidity. The film is measur
27、ed under the same conditions of temperature and humidity as defined in clause3. A.4 Choice of longitudinal pitch The choice of different pitch (B: long pitch, and (B:short pitch), for original and print motion-picture films, depends on the necessity of printing and the type of printer used. In the m
28、ost common type of printer, the original and print films move continuously over a printing sprocket. Consequently, the original film must be shorter in pitch than the print film in the approximate proportion of the thickness of the film to the radius of curvature of the printing sprocket. With curre
29、nt printing sprocket design, the value for this pitch differential is0,3%, with experience showing that a tolerance of 0,1% is acceptable. With “low-shrinkage” film base, it is common manufacturing practice to set the aim for the pitch of original films at a value of0,2% shorter than that of the fil
30、ms on which they will be printed. The additional shrinkage that occurs in the original film, because of processing and ageing before printing, should result in the desired (0,3 0,1)% shorter pitch. A.5 Effect of humidity It is a common tendency of the film to expand when exposed to high relative hum
31、idity. Allowance should be made for this factor in equipment design. A.6 Dimensions in inches The inch dimensions given inTable A.1 follow the practice of those countries using the imperial system. Table A.1 Dimensions in inches Dimension 65 mm film 70 mm film A 2,558 0,002 2,754 0,002 B 0,187 0 0,0
32、00 4 B 0,186 6 0,000 4 L 18,700 0,015 L 18,660 0,015 C 0,110 0 0,000 4 0,110 0 0,000 4 D 0,078 0 0,000 4 0,078 0 0,000 4 E 0,117 0,002 0,215 0,002 F 2,214 0,003 2,214 0,003 G 0,001 max. 0,001 max. R 0,020 0,001 0,020 0,001BS ISO 3023:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsI
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