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filmscanners: Emulsion flaws (was dust in SS4000)
Martin and others:
This is another Roger (not Miller), but I have been following
the "Dust" thread with interest.
I have often noticed tiny spots on my scans (particularly
since I got a Minolta Scan Dual II, which shows the spots much more
than my previous Canon FS2710).
I stuck a Kodak Ektachrome 64T slide (that I developed this
morning) under my microscope and cranked up the magnification to
400x. The enclosed Nikon Coolpix 995 image taken through the
microscope shows what I saw. This is an area of the slide which is
almost transparent - the orange area at the bottom shows the film
grain. The bubble-like flaws are in a different plane from the grain,
on the outside layer of the emulsion. I can tell this by where I have
to focus the microscope to see them.
I developed the film myself, using double distilled water for
the final rinse. I must admit this is one of the worst examples of
these bubbles I have seen, but they do show up on most of my slides,
on many different types of film. I thought it might be the result of
a processing error, but then I saw the same bubbles on a Kodachrome
64 slide from 1975.
Description: JPEG image