PMK and Bergger Films

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I'm looking for N, N-1 and N+1 times for PMK developer with usual films as Tri-X, Plus-X, Tmax 100 and 400, Ilford FP4+ and HP5+, Bergger BPF 200 (with the right iso rating). Is there somebody who have tried this and get informations on results (accutance, values range etc...)

Thanks

Jean-Bernard :-)

-- Jean-Bernard Roux (jeanbernard.roux@voila.fr), September 16, 2001

Answers

Jean-Bernard: I do not have N-1 and N+1 times, but I do have normal times for most films on my web site at http://unblinkingeye.com/Articles/Times/times.html. This should at least provide a starting point for you.

-- Ed Buffaloe (edb@unblinkingeye.com), September 17, 2001.

Salut Jean-Bernard The only answer to your question is.DO YOUR OWN TESTS to establish the appropriate film speed (Exposure Index)and developpement times based on your own methods and procedures.For testing your system you can find some useful informations in Ansel Adams book "The Negative" or on Barry Thornton web site ( barrythornton.com ).PMK is a pretty good developper for the films you mentioned,all respond well to it. Y agree with Ed.His developpement charts are in your case only starting points.I'm amazed, why do you need so much films? Pick two films,one medium speed and one high speed,test them in PMK.Get to know these two well before adding another.So,don't be obsessed with the pursuit of the perfect negative nor waste your time in testing too much film/developper combinations It looks like the search of the Holy Grail.Go out in the field,have fun in photography and do your best in the darkroom to get the real goal in Black and White "The Perfect Print"

Amicalement Alain.

-- Alain Degermann (degermann.alain@wanadoo.fr), September 23, 2001.


Bergger BPF200 (EI:100) N=14M, +1=17M (exp.-1/2 stop), -1=11M (exp.+1/2 stop) FP4+ (EI:80) N=13, +1=20.5 (exp.N), -1=11 (exp.+1/3), HP5+ (EI:400) N=14.5, +1=18 (exp. N) -1=11 (exp. +1/3) All @68F. You will still want to do your own testing.

-- Michael Fraser (mdfraser@earthlink.net), September 23, 2001.

I did quite a bit of printing from Bergger BRF 200 today, having rated the film at 100 and developed in PMK for 6 minutes at 80 degrees. It prints beautifully on grade 3 Galerie, so I'd say it is slightly underdeveloped. I'll bump it up to 8 minutes. That would put my time for 70 degrees at 13 to 14 minutes, just as Michael recommends.

-- Ed Buffaloe (edb@unblinkingeye.com), September 23, 2001.

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