The standard specifies the emulsion layer orientation and exposure area position, as well as the shooting frequency, when a 16mm camera uses single-row perforation and double-row perforation film to shoot silent and sound films. This standard applies to 16 mm movie cameras. GB/T 4641-2000 Usage of 16mm movie film in cameras GB/T4641-2000 standard download decompression password: www.bzxz.net
The standard specifies the emulsion layer orientation and exposure area position, as well as the shooting frequency, when a 16mm camera uses single-row perforation and double-row perforation film to shoot silent and sound films. This standard applies to 16 mm movie cameras.

ICS37.060.20
National Standard of the People's Republic of China
GB/T 4641\u20142000
eqy Is0 25:1994
Camera usage of 16 mm motion-picture film2000-10-17 Issued
2001-03-01 Implementation
Issued by the State Administration of Quality and Technical Supervision
GB/T4641-2000
This standard is a revision of the national standard GB/T4641\u20141984 based on the international standard IS025:1994. This standard is the basic standard. In the revision process, in accordance with the principle of actively adopting international standards and advanced foreign standards, the international standard ISO25:1994 "Movies\u2014Use of 16 mm motion-picture film in cameras\u2014Technical specifications" was equivalently adopted. The technical content is consistent with the international standard ISO25:1994, but the description and arrangement of the standard clauses are different from the international standard. Therefore, the revised national standard is equivalent to the international standard.
The International Organization for Standardization ISO/TC36 revised the international standard ISQ25:1976 in 1994. During the revision process, part of the technical specifications in Chapter 3 of the original standard were revised, and technical regulations on the frequency of film photography for television were added. Since the international standard was equivalently adopted in the revision, the corresponding part was also modified to make it consistent with the international standard. The annotations in the technical requirements were cancelled in the text of the standard in combination with my country's actual situation. This standard was proposed by the State Administration of Radio, Film and Television. This standard was issued by the China Film Science and Technology Research Institute. This standard was drafted by the China Film Science and Technology Research Institute. Drafter of this standard: Wu Shuzhi
This standard was first issued in 1984, and this revision is the first revision. This standard is entrusted to the China Film Science and Technology Research Institute for interpretation. GB/T 4641\u20142000
ISO Foreword
ISO (International Organization for Standardization) is a worldwide federation of national standards associations (ISO member groups) of various countries. The formulation of various international standards is completed by ISO technical committees. Any member group interested in the topics being studied and discussed by the existing technical committee has the right to select representatives to participate in the technical committee. Official and non-official international organizations associated with the International Organization for Standardization can also participate in this work. ISO and the International Electrotechnical Commission (IEC) have close cooperation in the field of electrotechnical standardization. All draft international standards adopted by the technical committee should be distributed to member groups for comments. At least 75% of the members must vote in favor for the standard to be approved.
International Standard ISO25 was formulated by ISO/TC36 Film Technical Committee. This standard is the second edition, which cancels and replaces the first edition (IS025:1976). Some technical contents in the second edition have been modified. 1 Scope
National Standard of the People's Republic of China
Camera usage of 16 mm motton-picture filmrnGB/T 4641\u20142000
eq IS0 25:1994
Replaces GB/T 4641\u20141984
This standard specifies the emulsion layer orientation and exposure area position, as well as the shooting frequency when 16\u21611m camera uses single-row perforation and double-row perforation film to shoot silent and sound films.
This standard is applicable to 16 mm movie cameras. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. 1SO 26:1993 Motion picture films - Use of 16 mm motion picture prints in projectors for direct front projection - Technical specification 1SO 69:1990 Motion picture films - 16 mm motion picture film and magnetic reels - - Cutting and perforation dimensions GB/T 4642-1984 Position and dimensions of the image produced by the window of a 16 mm motion picture camera on the film (neq ISO 465:1976) 3 Technical specifications 3.1 The photographic rate shall be 24 frames per second for films with optical or magnetic soundtracks or for films with separate sound and picture for use with optical or magnetic sound recorders. 3.2 The photographic rate for silent films shall be determined by the intended use. It shall normally be 24 frames per second. 3.3 Films shot only for television use may be shot at a frequency of 25 frames per second. 4 Position and orientation of the film emulsion layer
Except for special purposes, the emulsion layer must face the film camera lens. The position of the image formed by the film window on the film refers to GB/T4642, as shown in Figure 1.
Approved by the State Administration of Quality and Technical Supervision on October 17, 2000, for implementation from March 1, 2001
GB/T4641\u20142000
Imaging light
Direction of film movement
The film shown in Figure 1 is viewed from the inside of the camera by an observer looking toward the camera lens, with the emulsion layer facing away from the observer and toward the lens. People's Republic of China
National Standardwww.bzxz.net
Use of 16mm motion picture film in video cameras GB/T 4641\u20142000
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First edition in March 2001, 2001 First printing in March, print run 1-1000
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