Plus, a graph of the transmission of fully exposed and developed color negative film, from recorded by here:
This helps explain how dust removal scanners with ICE work--the film dyes are transparent in the infrared, but dust isn't. An infrared scan of the negative shows a clear negative with only the dust visible. Silver grains in black and white film are uniformly opaque to light and so ICE won't work with it.
2 comments:
Dean,
Are you using a digital camera for these shots? Many modern cameras have sensors that work down into the IR range. I've tried shots with both the Nikon 990 and Nikon D100 and a dense Kodak IR filter and it works beautifully.
I guess I never explained that! It's a Canon A95 digital camera.
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