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Topic: A Question for John Pytlak
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John Pytlak
Film God
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Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 06-05-2000 01:43 PM
Kodak developed newer classes of dyes for color print film during the 1970's. Because they were much more expensive to manufacture, they were introduced in "premium" products intended for prints having long-term value (most release prints are deliberately destroyed after the initial release). The films were EASTMAN Color LF Print Film 7378 (for process ECP) and EASTMAN Color LFSP Print Film 7379 (for process ECP-2), introduced in 1979. In 1982, EASTMAN Color Print Film 7/5384 was introduced, using the more stable dyes and available at regular prices for ALL prints. Product improvements since then have always included image stability as a key feature, even for release prints. This information is all contained on Kodak's website: http://www.kodak.com/US/en/motion/about/chrono4.shtml Of course, processing (especially the washes) and storage conditions can significantly affect long term stability of both the image and film base. SMPTE Recommended Practice RP 131 specifies proper storage conditions for maximum film life. NAPM IT9.11 (ISO 18911) also specifies proper storage conditions. Kodak publication H-23 "The Book of Film Care" has much good information about film handling and storage. It is available on Kodak's web site: http://www.kodak.com/US/en/motion/support/technical/care.shtml ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Eastman Kodak Company Research Labs, Building 69, Room 7419 Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com
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