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RE: Extreme techniques... some questions

>I have come across Infrared one time, the stock was in rolls of 30m, 
>but the producer said he could only get a few rolls only, because it 
>was manufactured for the army mostly (true or not?), in any case very 
>difficult to get, the look of this stock is absolutely amazing, as 
>you have probably seen on photographs, but it is bloody grainy, even 
>a Spirit with a noise reducer set at 300db could not cope with it!

Colour infrared film is (was?) an Ektachrome film process. The 35mm
process was said to be only operated by the US army, although in stills
lengths it's still around and relatively easy to get hold of. In
general, greens and blues reproduce as blue, reds reproduce as green,
and infra-reds (heat emitters) reproduce as red. You can get some
similar cross-coloured effects in film by printing tri-separations and
re-combining them through the wrong filters, or in telecine with
profound and wilful use of secondary colour correction.

Black and white infrared film (it's sensitive to infra-red as well as
visible light, so is used in surveillance and at night) goes through a
normal black and white negative process. But yes, it's grainy.

            Dominic Case   
            Atlab Australia   

** thanks to Kodak, Jim Erickson, Jan Janowski, and Optimus for
contributing to the TIG in 1997
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