Scientific and other projects in astronomy, geoscience, physics, and electronics.
Tuesday, May 03, 2005
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.