Sandy King (sanking@hubcap.clemson.edu)
Mon, 05 Jul 1999 20:38:58 -0400
Adam,
Perhaps I don't understand your terminology. If I do, however, there
appears to be something wrong with your Rollo Pyro. My tests with Pyro ABC+
(same as Rollo Pyro) and Ilford FP4+, processed at 74F in a tube with
constant (but gentle) agitation (3 oz per sheet of 5X7 film), give the
following results, assuming density range of 1.5.
N -2 4.5 minutes
N -1 5.45 minutes
N 7.5 minutes
N +1 9 minutes
N +2 12.5 minutes
Times for HP5+ are slightly longer to the same CI.
Sandy King
>Hi all,
>
>I have no idea why, but since I began alt stuff a number of years ago,
>I've compulsively taken pictures of subjects that have a stop, or two of
>contrast. Every so often, I'll meter a scene and be amazed to read
>three or even four (!) stops of contrast - but this is all too rare for
>me. Maybe, I'll simply have to start making silver gelatin prints
>again... maybe someone who has spent time with this problem can give me
>a pointer or two..
>
>I'm having my best luck right now with FP4+ developed in Rollo Pyro in a
>Jobo. Yesterday, I processed a few negs (the original scenes all had >2
>full stops contrast) for a whopping 14 minutes at 22C. They are just at
>the edge of being useful to me now.. I'll give a go up to 16 or 17
>minutes next round, but expect to see overall fogging setting in soon.
>
>Increasing the stain might be another avenue. Maybe PMK used in the
>Jobo might yield more stain? Any thoughts on that? Most of the
>subjects I shoot stay around for years, so I'd rather reshoot than do a
>pyro redevelopment or make copies (dust, pinholes, newton's rings,
>etc...)
>
>Any ideas for that elusive N+++ or N++++?
>
>-Adam
This archive was generated by hypermail 2.0b3 on Thu Oct 28 1999 - 21:40:35