This standard specifies the minimum ratio of optical magnification or reduction when using intermittent printing technology to convert film frame specifications. This standard applies to the optical printing process of films. GB/T 2927-1994 Technical requirements for optical printing ratios of film frame magnification or reduction GB/T2927-1994 standard download decompression password: www.bzxz.net
This standard specifies the minimum ratio of optical magnification or reduction when using intermittent printing technology to convert film frame specifications. This standard applies to the optical printing process of films.

National Standard of the People's Republic of China
Technical requirements for optical printing ratios of motion-picture film images-specification CB/T 2927.. 94
Replaces GB 2927--#2
This standard adopts the international standard IS042381976 Technical requirements for optical printing ratios of motion-picture film images-specification Subject content and scope of application
This standard specifies the minimum ratio of optical enlargement or reduction when converting film image specifications using the optical printing process. This standard applies to the optical printing process of films. 2 Technical requirements
2.1 The optical enlargement and reduction ratios of motion-picture film images-specification are shown in Table 1. Table 1 Optical printing ratios for enlarging or reducing the frame of a motion picture film Original negative for printing
Film width, mml
65 or 70
Non-deformed
Non-deformed
Width, mm
(minimum)
Height, m
23.00*g3m
70(5p)
70(5p）
7℃(8p)
Printed color film
Non-deformed
Non-deformed
Non-deformed
Non-deformed
Non-deformed
Non-deformed
Width, nm
(minimum)
(minimum)
Height, mm
18. 60 *9: 20
16.00:2:50
16:00-:
33. 00 6.50
:13. 25±0. 12bzxz.net
Interval printing
Big or small ratio
(minimum value)
1.70 t.8G
2.2 The ratios specified in Table 1+ can be used to guide the optical printing process of film image enlargement or reduction. The printed picture should not exceed the film frame size specified in the relevant basic standards: (The enlargement or reduction ratio of optical printing is the ratio of the printed film positive image size to the original film image size for printing. In the process of transferring a film image of one specification to a film image of another specification, in order to reduce the loss of image quality, the State Technical Supervision Bureau 1994-12-28 Approved for implementation on August 1, 1995
GB/T2927
Except for cutting the original page content and redrawing, the enlargement or reduction ratio of intermittent optical printing should be as small as possible. The ratio specified in the table is based on the film without shrinkage. Additional remarks:
This standard was proposed by the Ministry of Radio, Film and Television of the Republic of China. This standard is under the jurisdiction of the China Film Science and Technology Research Institute of the Ministry of Radio, Film and Television. This standard was drafted by the China Film Science and Technology Research Institute of the Ministry of Radio, Film and Television.
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