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Re: Reciprocity & dev times FP4+ with PQ dev.

Miles

15:34 23 Apr 07

did you actually do sheet film test with FP4+ with PQ dev ?

There is a method for determining the resciprosity value for any film and I believe I either read it in the BTZS book or in a BTZS newsletter...this pm I'll see if I dig up the reference for you. It seems to me that reciprocity effect is more specific to the film itself than the dev agent(not discounting the agents effecT BUT..) I wanted to use a reciprosity value for TMY in pyrocat-mc and there was no value for this combination soooo.. I guestimated that it would be similar to TMY in D76 and used that value...whether just dumb luck or good guess all of my long exposures have been incredibly accurate...you most likely will get a better answer from one of the experts shortly...