1、SMPTE STANDARD for Motion-Picture Film (35-mm) - Perforated 8-mm Type S, 2R-I664 (1 =O) SMPTE 169-2002 Revision of ANSI/SMPTE 169-1997 Page 1 of 3 pages 1 Scope This standard specifies the cutting and perforating dimensions for 35-mm motion-picture film with one row of 8-mm type S perforations and o
2、ne row of special perforations having a perforation pitch of 0.1 664 in (4.227 mm). The film stock described in this standard is intended for use as an intermediate film in the production of prints. 2 Normative reference The following standard contains provisions which, through reference in this tex
3、t, constitute provisions of this standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated
4、below. SMPTE 223M-2001, Motion-Picture Film - Safety Film 3 Dimensions 3.1 The dimensions shall be as given in the figure and table. 3.2 The dimensions pertain to a safety film as defined in SMPTE 223M. 3.3 The dimensions apply at the time of cutting and perforating for film adjusted to a temperatur
5、e of 23OC 5 1 OC (nominally converted to 73F f 2F) and a relative humidity of (50 5 2)%. The manufac- turer may indicate other nominal temperature and humidity conditions under which the dimensions apply. NOTES 1 The title of this standard was established by the application of a nomenclature system
6、developed for all film dimension standards. Each title provides an indication of the film width, a code designation for the perforation shape (BH, KS, DH, or CS) or the number of rows of perforations (1 R, 2R, etc.), depending upon which is the significant factor, or the perforation pitch without th
7、e decimal point. 2 The metric conversion of dimension A is purposely chosen and shown to three decimal places to prevent the maximum width dimension from exceeding 35 mm. 3 As indicated in the scope, the film to which this standard applies will normally be used as an intermediate and, therefore, wil
8、l not be slit into smaller width strips at any stage of its use. The special row of perforations has a lesser edge-to-perforation spacing relative to the row of 8-mm type S perforations. The perforations in the special row also are larger than the latter. CopyrigMO NO2 by THE SOCIETY OF MOTION PICTU
9、RE AND TELEVISION ENGINEERS 595 W. Haitsdale Ave., white Plains, NY 10607 (914) 761-1100 Approved July 26, 2002 SMPTE 169-2002 A B C C D E G L P R SPECIAL 8-MM TYPE S PERFOR ATION S PERFORATIONS ROW O ROW I O c! O. O L a T Figure 1 - Dimensions -E EFEREN CE EDGE - Table 1 - Specifications Dimensions
10、 Inches Mill met e rs Film width 1.377 f 0.001 34.975 f 0.025 Perforation pitch Perf o rat ion width Special perforation width Perforation height Edge to perforation Perforation misalignment 1 O0 consecutive perforation pitches Lateral perforation displacement 0.1 664 0.0360 0.0450 0.0450 0.050 0.00
11、1 5 16.640 1.251 f 0.0004 f 0.0004 f 0.0004 f 0.0004 f 0.002 max f 0.017 f 0.001 4.227 0.914 1.1 43 1.1 43 1.27 0.038 422.66 31.78 f 0.010 f 0.010 i 0.010 I 0.010 i 0.05 max I 0.43 i 0.03 Radius of perforation fillet 0.005 f 0.001 0.13 t 0.03 Page 2 of 3 pages SMPTE 169-2002 Annex A (informative) Ad
12、ditional data A.l The user is reminded that, as a plastic, film can change dimensions temporarily due to moisture or temperature, or permanently due to solvent loss or strain effect. A2 Film for positive use has a longitudinal pitch 0.2% longer than its companion negative. Shrinkage of the negative
13、during aging and processing prior to printing will generally not exceed 0.2%. Thus, the negative stock is expected to be 0.3% i 0.1% shorter than the positive. This difference will minimize slippage between the two on the 12-in (305-mm) circumference sprocket of the printer, assuming a film thicknes
14、s of 0.0055 in to 0.0065 in (0.140 mm to 0.165 mm). A3 The uniformity of pitch, hole size, and margin (dimensions B, C, D, and E) is an important variable affecting steadiness. Variations in these dimensions, from roll to roll, are of little significance compared to variations from one perforation t
15、o the next within any small group of consecutive perforations. As an example, the uniformity of the margin is uniquely critical for optical printing. During the printing process, the placement of the image on the film is usually with respect to successive lateral pairs of perforations at one-frame i
16、ntervals. During subsequent projection, however, the portion of the image projected is usually located, not by these perforations, but by the edge of the film. The lateral steadiness of the projected image is, therefore, directly related to the frame-to-frame uniformity of the margin. A4 For historical background on the development of this standard, refer to A. J. Miller and A. C. Robertson, “Motion-picture film - its size and dimensional characteristics,” Journal of the SMPTE, 74: 3-1 1, January 1965. Page 3 of 3 pages
