FotoDave@aol.com
Sat, 20 Feb 1999 21:15:39 -0500 (EST)
In a message dated 2/20/99, PM 05:22:54, alt-photo-process-l@skyway.usask.ca
writes:
<<Lith film is to be avoided if the direct process is to work. It is made for
a purpose to form black or white, which is why the pinholes appear.>>
Lith film can be successfully processed for low contrast, but to use it in
direct reversal process is more difficult / challenging. The reason is if we
process the film to low contrast, the high density area is not fully
developed, so after the reversal, the Dmin would be high, which will give long
printing time.
The way to try to work around it is to expose the film to near the shoulder
(but still have good separation) and then develop it to full in order to get
reasonable Dmin, but of course when you do that, the contrast will be very
high. I believe that is the reason why some are working on tests in the
attempt to tame the contrast during the re-development.
Dave S
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