Re: sheet film

Gordon J. Holtslander wrote:

>Hi:
>
>Sheet film typically must be processed in complete darkness. Many people
>use sheet film that is intended for use in the printing industry to make
>high contrast negatives. This film is called orthographic lith film.
>
>The label Orthographic means the film is not sensitive to all colors of
>light. It typically is not completely sensitive to red light. This allow
>one to use this type of film with a red safelight.
>
>People will process this in a dilute print developer or a specialized
>low-contrast developer.
>
>
>
Just as example: With the very red sensitive but also very high contrast
Kodak Technical Pan exposed as 100 ASA I tried Rodinal in a dilution of
1:150 for 7 minutes and it worked very well: about same gamma as a t-max
100 5 1/2 minutes in Rodinal 1:25, so it should also work with ortho films.
taco

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Received on Wed Apr 7 11:09:10 2004