ISO-7943-2-1987.pdf
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1、7943 PT 12-87 q851703 0058726 r F -35-45 e-yl - 70 INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXAYHAPOAHAR OPTAHMSA! the significant difference between them being the dimensions of the picture area. IS0 7943-3 specifies the dim
2、ensions of cores of film rolls in- cluding the key-ways in the ends of the cores and the maximum overall diameter of film rolls. 1 Scope and field of application This part of IS0 7943 specifies the film type for transparencies and the dimensions of mounted and unmounted transparen- cies, including t
3、ransparency frames, in order to ensure com- patibility between overhead projectors and the transparencies within each type of overhead projector system (type A and type BI. There is some degree of interchangeability of transparencies between projectors of type A and type B. 2 References IS0 216, Wri
4、ting paper and certain classes of printed matter - Trimmed sizes - A and B series. IS0 7830, Photography - Safety photographic films other than motion-picture films - Material specifications. For the purpose of this part of IS0 7943 the following defini- tions apply. 3.1 NOTE - Film may be in either
5、 sheet or roll form. film : The transparent material used for transparencies. 3.2 an image for projection by an overhead projector. transparency: The general term used for film carrying 3.3 contains the image or images for projection. information area: That part of a transparency which 3.4 porting)
6、a transparency, which includes a mask opening. transparency frame : The frame for mounting (or sup- 3.5 location holes : Holes in the transparency frame or un- mounted transparency which fit the location pins on the projec- tion stage of an overhead projector to position transparencies. 4 Film for t
7、ransparencies 4.1 be safety film conforming to IS0 7830. All film used for overhead projector transparencies shall 4.2 Sheet film The dimensions of sheet film shall be as given in table 1. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA
8、 Technical Standards 1/9972545001 Not for Resale, 04/23/2007 22:31:09 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 4851903 0058929 o r IS0 7943-2 : 1987 (E) Table 1 - Sheet film - Designation and dimensions Dimensions in millimetres I Designation I Dimensions I s1 s2 s
9、3 s4 216 x 267 f 2 . 0 216 x 279 f 2 . 0 210 x 297 f 2 . 0 297 x 297 f 3.0 5.2 The information area of unmounted transparencies shall not exceed the minimum dimensions of the picture area of the type of projector, A or B, for which the transparency is intend- ed (see IS0 7943-1). 5.3 The dimensions
10、and locations of location holes shall be as shown in figures 1 and 2 for S3 and S4 sheet films respec- tively. A4 size as specified in IS0 216. 4.3 Film for roils The width of film for rolls shall be as given in table 2. Table 2 - Roll film - Designation and width Dimensions in millimetres 5.4 The i
11、nformation areas on sheet films S3 and S4 shall be centred as shown in figures 1 and 2 respectively. 6 Transparency frames 6.1 sions of which are specified in 6.3. Mounted transparencies shall have a frame the dimen- Designation Width of film Fil 250 (for type A overhead projector) R2 285 - + (for t
12、ype B overhead projector) 6.2 The provision of a field is recommended on the transparency frame in which data may be printed or written, for example title of transparency, author, reference number. 6.3 Transparency frames types AI, A2, BI, 82 and C shall comply with the dimensions shown in figures 3
13、, 4, 5, 6 and 7 respectively and in table 3. 5 Sheet transparencies Sheet transparencies may be used unmounted or mounted. 5.1 correspond to the dimensions of the film given in table 1. The outer dimensions of unmounted transparencies shall Table 3 - Transparency frames - Designations and mask dimen
14、sions Dimensions in millimetres Nominal mask Mask aperture Designation opening size Dimensions Corner cut A l 250 x 250 247 x 247 f 2.0 60 f 2.5 (radius) A2 200 x 250 195 x 247 k 2 . 0 15 f 2.5 (radius) B1 280 x 280 + 2.0 40 x 40 + 1.0 (diagonal) or 40 - 2 (radius) I 82 I 200 x 285 I 195 x 280 f 2.0
15、 I 15 f 2.5 (radius) I C I 180 x 240 I 180 x 240 f 1.0 I 13 max. (radius) I I NOTE - The transparency frame type C is primarily used in the USA. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Re
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