1、BRITISH STANDARD BS5550-3.1.2: 1978 Cinematography Part3: 35mm film Section3.1 Raw stock Subsection3.1.2 Specification for the dimensional features of magnetic coatings on35mm perforated film UDC778.5.068.26:778.534.455.068BS5550-3.1.2:1978 This British Standard, having been prepared under the direc
2、tionof the Cinematograph Standards Committee, was published under the authority ofthe Executive Board on 30 September1978 BSI10-1999 The following BSI references relate to the work on this standard: Committee reference CMS/23 Draft for approval77/65052 ISBN 0 580 10295 5 Cooperating organizations Th
3、e Cinematograph Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government department and scientific and industrial organizations: Association of Cinematograph, Television and Allied Technicians Association of Film Laborat
4、ory Employers* British Broadcasting Corporation* British Film Institute British Kinematograph, Sound and Television Society* British Photographic Association Cinematograph Exhibitors Association of Great Britain and Ireland* Film Laboratory Association Film Production Association of Great Britain* H
5、ealth and Safety Executive Illuminating Engineering Society Independent Television Companies Association* Royal Photographic Society* The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of
6、 this British Standard: Association of Independent Cinemas Institute of Amateur Cinematographers Co-opted members Amendments issued since publication Amd. No. Date of issue CommentsBS5550-3.1.2:1978 BSI 10-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope and fiel
7、d of application 1 2 References 1 3 Film stock 1 4 Magnetic coating 1 5 Balance stripes 1 Table 1 Types of coating on35mm perforated film without picture 1 Publications referred to Inside back coverBS5550-3.1.2:1978 ii BSI 10-1999 Foreword This British Standard supersedes part of BS2981 “Dimensional
8、 features of magnetic sound recording on perforated film” which is now wholly withdrawn. The other parts of BS2981 are, or are being, revised as Subsections of BS5550, which is to encompass eventually all British Standards on cinematography. BSI Sectional List1, obtainable free from the BSI Sales De
9、partment catalogues the British Standards on cinematography. The latest edition of SL1 should be referred to particularly in this developing situation. This standard takes account of discussion, agreements and International Standards prepared by Technical Committee36, Cinematography, of the Internat
10、ional Organization for Standardization (ISO). A British Standard does not purport to 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 obligati
11、ons. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and2, an inside back cover and 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 ins
12、ide front cover.BS5550-3.1.2:1978 BSI 10-1999 1 1 Scope and field of application This British Standard specifies the dimensional features of magnetic coatings on35mm perforated film without picture, for recording and reproduction of sound records. 2 References The title of the publications referred
13、to in this standard is listed on the inside back cover. 3 Film stock The film stock to be coated shall conform to the dimensions for35mm ISO type P perforated film given in BS5550-3.1.1 1) . NOTE17.5mm coated film is obtained by slitting in half the film described in clause4 and figures(a) or(b) in
14、Table 1. 4 Magnetic coating The magnetic coating thickness shall be uniform and shall be not more than0.02mm. The dimensions of the coating shall be as stated in Table 1 and shall be one of the types shown in figuresa),b) andc), as follows: a) coated over the full width of the film stock; b) coated
15、over the width between the perforations; c) coated with a sound record stripe and a balance stripe. 5 Balance stripes All balance stripes shall be of the same composition and thickness as the sound record coating. Table 1 Types of coating on35mm perforated film without picture 1) In course of prepar
16、ation. Dimensions mm A B 12.50 0.25 C 24.90min. 27.40max. D 4.90 +0.15 0 30.05 0 0.152 blankBS5550-3.1.2:1978 BSI 10-1999 Publications referred to BS5550, Cinematography. BS5550-3, 35mm film. BS5550-3.1, Raw stock. BS5550-3.1.1, Specification for cutting and perforating dimensions of35mm motion-pict
17、ure film and magnetic film 2) . 2) In course of preparation.BS5550-3.1.2: 1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the internatio
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