Qualcomm Incorporated (QCOM) Message Board

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Technology Stocks : Qualcomm Incorporated (QCOM)

QCOM 172.98

+1.1%

Jan 2 9:30 AM EST

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To: Jon Koplik who wrote (23899)	3/9/1999 6:58:00 PM
From: Drew Williams	of 152472

<<Anyone know whether or not "film" (as in movie theaters) uses silver (or silver halide or whatever it is) ?>> The color negative film that goes through the movie camera does indeed still use silver, although not nearly as much as it used to. Silver is removed from color film during processing and is replaced by dyes. The film being projected in your local cineplex has no significant silver content. Conventional black and white films leave silver remaining in both negative and the positive images. The black is a metallic silver compound -- Silver Halide reduced from Silver Bromide, if memory serves. (I did a science project on this back in 8th grade -- a loooong time ago.) Kodak and Ilford both market black and white films that go through the same chemical processes as do color films. In these cases, they too have all the silver removed and replaced by dyes. There was a time that photo labs made more money recycling the recovered silver than they did from photofinishing.

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