HP5+ overexposed by mistake
I made a mistake choosing my Hasselblad roll back, I picked one with HP5+ loaded thinking that it was PANF+, I shoot it as a 50 asa film, so it's like 4 stops overexposed. Any suggestions how to develop it?. I use D76 1+1 for the HP5. Should I use more dilution?, less time?, both?, try another developer?... of course, I'll try to shoot the hole thing again with the correct exposure, but I don't want to give up with the one I already made. May be is the time for me to confirm if the David Vestal's moto "expose enough and do not develop too much" is true .
Thats 3 stops over exposed.. Cut the developing time.
As long as you don't develop for too long you should be absolutely fine. If it were me I would most likely reduce development about 40% or so.
If the roll has important shots on it, shoot another roll at 50 and try it first, and adjust as necessary.
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I rate mine at no more than 200, sometimes 100, so you're not 4 stops overexposed. Do you know anyone who's experienced at development by inspection? You don't want to blow highlights with HP5+. They can block pretty badly.
Depending on how much trouble you want to go to, Ilford Perceptol (like Kodak Microdol-X) reduces the speed somewhat. Depending on your metering technique and the subject matter, you might not have overexposed as much as you think. I would reduce the dev time a bit. Maybe 40% less is too much of a reduction. I'm guessing here.
If it was a highly contrasty scene, you might have exposed just about right.
I normally rate 400 speed films at 200 and use a generous exposure as well.
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What does like four stops mean?
Originally Posted by Jose A Martinez
Oh, I see!
Originally Posted by Jim17x
How about a snip test first before processing the whole roll?
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I'd develop it in rodinal 1/50, you lose around 1 1/2 stops in Rodinal so you might get slightly heavy negs but they should print fine
Is that really exactly what you meant to say ??? There seems to be a very small loss, less than half a stop, but maybe I use a very long time for developing. I only use Rodinal for APX though, so maybe every other film has a secret slow-down.
Originally Posted by R.Gould
For the OP, I'd suggest trying a slow developer (eg. Perceptol) and pull slightly, or use your normal dev and pull quite a bit. Three stops is two stops more than 'doing nothing and getting nice shadows' after all.
I find that with HP5 in Rodinal, either 1/50 or 1/25 it loses a lot of speed, it is only with Ilford film I have this problem, using Kodak or Foma I lose about 1/3 of a stop, I don't know why, but with Ilford I only get around 320 even in D76, that goes for all Ilford film, Quality is fine but it seems to lose a lot for me, but it is a few years now since I have used any Ilford, prefering Kodak Tri x or Fomapan 400