Pulling HP5 400 to 100 ASA?

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Could someone tell me of their experience's,if any,on this subject. Developer? Time? Agitation? Any response appreciated. Important shots done without checking ISO setting. Thanks,from down-under.

-- Patrick Doyle (konew1@yahoo.com), March 26, 2001

Answers

I'm no expert on N-minus development, but it seems to me that if you have overexposed, then underdevelop, you will end up with some very low contrast short-scale negatives. Does anyone know if a two-part developer like Diafine or Emofin would work for this situation?

-- Ed Buffaloe (edb@unblinkingeye.com), March 26, 2001.

The latitude of HP5 is such that you should develop normally and deal with the dense negatives. Microdol-X or Perceptol undiluted will help since these developers cause the film to lose a stop of speed (EI 200.) In any case you'll lose a little sharpness and increase grain compared to proper exposure.

-- tim brown (brownt@flash.net), March 26, 2001.

Diafine works great on regularly exposed negs and should work very nicely here but you will just have a denser negative without to much contrast to worry about. I would say to stick with your regular developer and minus 20% for "normal development", -30% if it was a contrasty (sunny) situation.

-- Scott Walton (f64sw@hotmail.com), March 26, 2001.

If you can stand the soft edges, Microdol-X might work perfectly. In softening the edges to minimizes the grain, it eats some of the grain, giving a loss in speed.

-- Charlie Strack (charlie_strack@sti.com), March 26, 2001.

When I develop HP5+ in HC-110 (1:47) I rate it at EI 200. In fact I think most people rate it slower than 400. Exposed at EI 100 it won't look too bad even with "normal" development. You could cut back on recommended times by maybe 20% if you're worried about the highlights getting too dense.

-- Bob Atkins (bobatkins@hotmail.com), March 26, 2001.


HP5 pulled to 100ASA can be developed with D76 pure at 7min, by example. i think that rodinal at 1:25 must take 20min. agitation? first 30s, 5s each 30s...

-- Celcio (non@non.non), March 28, 2001.

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