I rather like Reichmann's explanation, but I was surprised when I
passed it on to a friend who asked whether he had ever looked through
a grain magnifier. He said that grain is all shades of gray. My
darkroom work was only for a few months, in spare time, many years
ago, but I have no memory of either black or white for film grain
although the focusing magnifier probably did not produce an image of
the actual grain.
The only thing I could find on the web was a brief explanation which
showed an illustration of a huge film grain crystal with a single
molecule making up the structure of the crystal being changed by a
photon. That would seem to indicate that a grain crystal could be any
level of gray depending on how many molecules were transformed by
light. Reichmann's argument depends completely on the on-off digital
state of a grain crystal. Does anyone know the answer?
A side note is that while I was googling for an explanation I was
amazed how commercial enterprise seems to have pushed internet
information way into the background.
Winsor
Long Beach, California, USA
>
> I am not trying to be right I am trying to make people think -
> thats my
> real job.
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