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Author
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Topic: Film Temperature
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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 03-02-2002 01:46 PM
Kodak published a very definitive study of the effects of radiant energy on both color and B&W prints:"Projection Performance of Theatrical Motion-Picture Films Using Xenon Short-Arc Lamps", Paul H. Preo, 92:938, Sept. 1983 SMPTE Journal Here are links to my articles in Kodak's "Film Notes for Reel People": http://www.kodak.com/country/US/en/motion/newsletters/reel/fall97/pytlak.shtml http://www.kodak.com/country/US/en/motion/newsletters/reel/winter97/projection.shtml
------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion
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John Pytlak
Film God
![](http://www.film-tech.com/ubbmembers/331cap.gif)
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 03-03-2002 03:44 PM
One idea would be to apply "Tempil Stik" or "Tempilaq-G" to the emulsion side of opaque film, and see which temperature grade melts: http://www.tempil.com/ http://www.tempil.com/Tempilstik.htm http://www.tempil.com/TempilaqG.htm Some color print films can be damaged by emulsion temperatures much above 160 Celsius. Kodak VISION Color Print is very resistant to heat damage, withstanding well over 200 Celsius. Permanent heat damage on a color print first shows up as an opalescent spot, that by reflected light appears magenta from the emulsion side, and yellow-green from the back side. On the screen, a "frosty" or "spidery" pattern might appear in dark scenes, especially in the "hot spot" of the projector lamp. ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion
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