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This topic comprises 2 pages: 1 2
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Author
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Topic: Print life on projection - how many runs?
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Frank Angel
Film God
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Posts: 5305
From: Brooklyn NY USA
Registered: Dec 1999
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posted 02-14-2006 08:59 PM
I have heard those figures as well -- between 2000 and 2500, but again, that's with expert handling and under optimum conditions such no extremes, i.e., screen sizes that require the largest of light sources.
If they could get those high numbers in the days of triacetate base, E-Z Fade Eastman dyes and no FilmGuard, it would be safe to say that today, given VKF sprocket design, advances in chemical treatments (ala FilmGuard) and Low Fade emulsions, we should be able to get lots more runs past what they could in previous decades, before a print would need to be retired.
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David Kilderry
Master Film Handler
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Posts: 355
From: Melbourne Australia
Registered: Sep 1999
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posted 02-14-2006 11:47 PM
We ran Raiders 4 sessions per day every day for a year on the same print. It was a 70mm print run on doubled up spools ( 1 + 2, 3 + 4, 5 + 6). It looked and sounded good when we finished with it and I believe this print still exists here. The film ran for another 6 months in the same building in 35mm.
70mm prints will generally last longer as the raised mag tracks protect the picture area.
With 35mm on spools or platter operation, about 6 months running at 5 session per day has been average in my experience -without film cleaners. This equates to about 900 runs.
Most long runs before 1990 were of course 70mm prints, so it is difficult to find long running 35mm prints. A few I can recall were Airplane 18 months - 2 prints, Life Of Brian 12 months plus - 2 prints, Ruthless People 8 months, Crocodile Dundee 12 months plus - 2 prints, Pretty Woman 6 months - 2 prints.
Generally we'd request a new print at the 6 month point due to crackle on the optical track (Dolby A) or in recent times digital track drop outs (Dolby Digital).
It is almost academic now as the last long runs (5 months plus)I recall were Titanic and Matrix here. With film cleaners, wet or PTR, and correctly maintained equipment there is no reason why very long runs on a single print can not be achieved.
David
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