1、BRITISH STANDARD BS ISO 69:1998 Cinematography 16mm motion-picture and magnetic film Cutting and perforating dimensions ICS 37.060.20BSISO69:1998 This British Standard, having been prepared under the directionof the Consumer Products and Services Sector Board, was published under theauthority of the
2、 StandardsBoard and comes into effect on 15 September 1998 BSI 04-1999 ISBN 0 580 29927 9 National foreword This British Standard reproduces verbatim ISO 69:1998 and implements it as the UK national standard. It supersedes BS 5550-2.1.1:1993 which is withdrawn. The UK participation in its preparatio
3、n was entrusted to Technical Committee CPW/36, Cinematography, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor
4、related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document
5、 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 to include all the necessary provisions of a contract. Users of Briti
6、sh 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 title page, pages ii to iv, pages 1 to 4 and
7、 a back cover. 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. Amendments issued since publication Amd. No. Date CommentsBSISO69:1998 BSI 04-1999 i Contents Page National foreword I
8、nside front cover Foreword iii Text of ISO 69 1ii blankBSISO69:1998 ii BSI 04-1999 Contents Page Foreword ii 1 Scope 1 2 Normative references 1 3 Dimensions 1 4 Identification of reference edge for guiding 3 Annex A (informative) Explanatory notes 4 Figure 1 Film with perforations along one edge (Ty
9、pe 1) 1 Figure 2 Film with perforations along two edges (Type 2) 1 Figure 3 Detail of perforation 2 Figure 4 permissible alignment deviation of the rows of perforations (Type 2) 2 Figure 5 Identification of reference edge 3 Figure A.1 Standard image position reference 4 Table 1 Dimensions and tolera
10、nces 2BSISO69:1998 BSI 04-1999 iii 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 in
11、terested in a subject 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 Electrotechni
12、cal Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75% of the member bodies casting a vote. I
13、nternational Standard ISO69 was prepared by Technical Committee ISO/TC36, Cinematography. This third edition cancels and replaces the second edition (ISO 69:1990), clauses2, A.2 and A.6 of which have been technically revised. Annex A of this International Standard is for information only. Descriptor
14、s: Cinematography, motion-picture film, motion-picture film 16 mm, perforating, cutting, dimensions.iv blankBSISO69:1998 BSI 04-1999 1 1 Scope This International Standard specifies the cutting and perforating dimensions for 16mm motion-picture and magnetic films with one or two rows of perforations
15、for the following two categories: a) 16mm motion-picture and magnetic films; b) manufacturer-designated 16mm professional motion-picture camera films with tighter tolerances. This International Standard applies to safety raw stock film as described in ISO543. 2 Normative references The following sta
16、ndards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated Were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged t
17、o investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 543:1990, Photography Photographic films Specifications for safety film. ISO 544:1976, Standard atmospheres f
18、or conditioning and/or testing Specifications. 3 Dimensions 3.1 The dimensions and tolerances shall be as given in Table 1 and in the accompanying Figure 1 to Figure 4, and apply to safety raw stock film as described in ISO543. The dimensions shall apply at the time of cutting and perforating for fi
19、lm adjusted to a temperature of 23 C 1 C and a relative humidity of (50 2)%, which is the recommended atmosphere for conditioning and/or testing with reduced tolerances specified in ISO554. NOTE 1If required by usage, the manufacturer may indicate other atmospheric conditions which applied to the di
20、mensional control and testing at the time of cutting and perforating. NOTE 2This International Standard is based on values adopted for film defined as “low-shrinkage”. See Annex A, clauseA.3 for definition of “low-shrinkage”. 3.2 The dimensions and tolerances of 16mm full-coat magnetic materials at
21、the time of cutting and perforating shall be as specified by dimensions B9 and L9 in Table 1. Figure 1 Film with perforations along one edge (Type 1) Figure 2 Film with perforations along two edges (Type 2)BSISO69:1998 2 BSI 04-1999 Table 1 Dimensions and tolerances Figure 3 Detail of perforation Fi
22、gure 4 Permissible alignment deviation ofthe rows of perforations (Type 2) Dimension All Films Designated professional camera films (with tighter tolerances in bold type) mm in mm in Notes A a B b B9 15,950 0,025 7,620 0,010 7,605 0,010 0,628 0 0,001 0 0,300 0 0,000 4 0,299 4 0,000 4 15,950 0,025 7,
23、620 0,010 7,605 0,010 0,628 0 0,001 0 0,300 0 0,000 4 0,299 4 0,000 4 4 and 5 4 and 5 C D E 1,830 0,010 1,270 0,010 0,900 0,050 0,072 0 0,000 4 0,050 0 0,000 4 0,035 5 0,002 0 1,830 0,010 1,270 0,010 0,900 0,025 0,072 0 0,000 4 0,050 0 0,000 4 0,035 5 0,001 0 4 4 4 and 5 E l F G 0,900 0,050 12,32 re
24、f. 0,025 max. 0,035 5 0,002 0 0,485 ref. 0,001 0 max. 0,900 0,050 12,32 ref. 0,010 max. 0,035 5 0,002 0 0,485 ref. 0,000 4 max. a L b L9 R 762,0 0,8 760,5 0,8 0,25 0,03 30,00 0,03 29,94 0,03 0,010 0,001 762,0 0,8 760,5 0,8 0,25 0,03 30,00 0,03 29,94 0,03 0,010 0,001 NOTE(applicable to all 16 mm film
25、s) NOTE 1Dimensions L and L9 represent the length of any 100 consecutive perforation intervals. NOTE 2Dimensions B9 and L9 (short perforation pitch) are provided to fulfil the requirements of continuous-sprocket printing (seeAnnex A, clause A.4). NOTE 3F is given as a reference dimension and typical
26、ly represents manufacturing punch and die setup. NOTE(applicable only to films designated by the manufacturer for professional camera use) NOTE 4In addition, the range of values measured in any 50 consecutive perforations shall not exceed 0,010mm (0,000 4 in) for dimensions B, B9, C and D, and 0,020
27、mm (0,000 8 in) for dimension E (see Annex A, clause A.1). NOTE 5In addition, the difference in dimensional value B and B9 between any consecutive perforation intervals shall not exceed0,005mm (0,000 2 in). Between consecutive perforations, the difference in dimensional value of E shall not exceed0,
28、010mm(0,000 4 in) (see Annex A, clause A.1). a B and L refer to long pitch. b B9 and L9 refer to short pitch.BSISO69:1998 BSI 04-1999 3 4 Identification of reference edge for guiding 4.1 For film perforated along one edge, the edge adjacent to the perforation is the reference edge. 4.2 For film perf
29、orated along two edges, the reference edge shall be identified by the winding of the film. With the film wound emulsion-in, and the roll of film unwinding downwards toward the observer, the reference edge is along the right-hand side of the film (see Figure 5). 4.3 The sequential edge numbers (key n
30、umbers or footage numbers) are exposed by the film manufacturer along the reference edge of the film. Figure 5 Identification of reference edgeBSISO69:1998 4 BSI 04-1999 Annex A (informative) Explanatory notes A.1 Uniformity of perforating The uniformity of pitch, hole size and margin (dimensions B
31、or B9, 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. Actually, it is the maximum variation from one perforation to the next within any small g
32、roup 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 materials, due to solvent or plasticizer loss. These changes are generally unifo
33、rm throughout the roll. A.3 Definition of low-shrinkage film Low-shrinkage film is film which shrinks no more than 0,2% from its original dimensions at the time of cutting and perforating, after the film has been a) kept in the manufacturers normal commercial packing for six months at recommended st
34、orage conditions; b) exposed; c) processed and dried as recommended by the manufacturer; d) stored in roll form, exposed to air, for a period not to exceed 30d at 18 C to 24 C and 50% to60% relative humidity. The film is measured under the same conditions of temperature and humidity as defined in 3.
35、1. A.4 Choice of longitudinal pitch The choice of different pitch (B: long pitch andB9:short pitch), for original and print motion-picture films, depends on the necessity of printing and the type of printer used. In the most common type of printer, the original and print films move continuously over
36、 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 current printing sprocket designs, the value for this pitch differential is 0,3%, wi
37、th 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 films on which they will be printed. The additional shrinkage that occurs in the
38、 original film, because of processing and ageing before printing, should result in the desired0,3% 0,1% shorter pitch. A.5 Effect of humidity It is the common tendency of the film to expand when exposed to high relative humidity. Allowance should be made for this factor in equipment design. A.6 Equi
39、pment design In order to achieve optimum cancellation of dimensional variables, it is preferable that equipment (e.g. cameras, printers, telecines and projectors) position the film laterally using the reference edge. Optimum vertical steadiness results when the same perforation (with respect to the
40、image) is used for vertical positioning in all equipment, and the +3 perforation is recommended as shown in Figure A.1 (see ISO 25:1994, Cinematography Camera usage of 16 mm motion-picture film Specifications). Figure A.1 Standard image position referenceblankBS ISO 69:1998 BSI 389 Chiswick High Roa
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