On Tuesday 17 July 2001 10:25, you wrote:
>....
>
> Do you know where the mask physically comes from?
>
> ...
Check (for instance) in
http://www.sunspotphoto.com/film/color.html (simple)
http://www.photo.net/photo/orange-negative-mask (short, but technical)
http://www.infoclub.com.np/science/hsw/film.htm (long, explains everything)
Very shortly the answer to your question is
The orange mask comes from the film ;-). It was put there by the manufacturer
to correct (or to make it easier to correct) the imperfections of the dyes in
the film.
Regards
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This archive was generated by hypermail 2b29 : Tue Jul 17 2001 - 03:03:12 PDT