Re: Enlarged Lith/Ortho negatives

Sandy King (sanking@hubcap.clemson.edu)
Mon, 29 Jun 1998 17:05:11 -0400

After working with the APHS litho film/PYRO PMK for the past several days I
have encountered a problem with pinholes on the final enlarged negatives.
The interpositives, on FP4, are clean, but when I enlarge these onto the
litho film (developed in PMK) there appear, as if out of the blue, numerous
small clear pinholes on the negative. In places the pinholes are larger and
the look is almost like that of the emulsion exploding. I am developing in
ABS plastic tubes, using about 250ml of PMK per 8X10 sheet, at around 74F.

Any ideas about what might be causing this problem?

Sandy King