SMPTE RP 48-1999 Lubrication of 16-and 8-mm Motion-Picture Prints《16 mm和8 mm电影拷贝的润滑》.pdf
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1、STD-SMPTE RP 48-ENGL 3777 E 8357iiRl 00133938 bl2 E SMPTE RECOMMENDED PRACTICE RP 48-1 999 Revision of RP 48-1 995 Lubrication of 16- and 8-mm Motion-Picture Prints Pagel of 2 pages 1 Scope This practice recognizes that surface treatment of 16- and 8-mm motion-picture prints to reduce the film surfa
2、ce friction coefficient is needed to promote good projection performance. The use of such treatment should result in increased steadiness, reduction of noise in the projector gate, and less tendency toward perforation damage during projection. 2 Specifications 2.1 Some type of lubricant or treatment
3、 to reduce the film surface friction coefficient should be applied to the full width of the film on both the emulsion and support sides prior to the first project ion. 2.2 Unless directed toward specific uses, as noted in 2.3, the lubricant or treatment should be remova b I e by certain fi I m -ci e
4、an i ng ope rat i o ns . If removed, the film should be relubricated or retreated prior to the next projection. 2.3 For specific types of projection equipment, particularly where cartridges or endless loops of film are involved, the manufacturer may Annex A (informative) Lubrication The coefficient
5、of friction measured as specified in ANCIINAPM IT9.4 does not necessarily correlate with actual projection life. To determine the efficiency of the lubricant, projection life (wear and tear) tests are recommended. Overall lubrication of the film must be restricted to amounts of lubricant below the l
6、imit at which mottle, streaks, and other coating defects become visible upon projection. Film recommend or require special methods, lubri- cants, or treatments especially suited to that equipment. In such cases, it is suggested that any nonrecommended lubricant or treatment which may be on the film
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