How long should I stand-develop Ilford HP5 Plus at EI 800 in Rodinal 1+100?
Asked 3/8/2020
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I’m developing Ilford HP5 Plus exposed at EI 800 in Rodinal 1+100 and couldn’t find a listed time specifically for 800 on the Massive Dev Chart. It shows times for 400 and 1600. For stand development, what time should I use, and is time the main variable to adjust?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
6y ago
2 Answers
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In my experience with stand developing, anything after an hour is generally just wasting time.
You are developing to chemical exhaustion...once the developer is, in fact, exhausted...nothing is happening.
If the developer exhausts in 60 minutes, then spending another 30 in the soup does nothing. If you're worried about it, go for 90-120 and call it a day. Keep in mind that, with stand development, you do not modify the amount of development by modifying the time in the developer! Keep the same, long, time for all ISO's.
If your film comes out overdeveloped, then decrease the total volume of developer you use. If it's underdeveloped, then increase the volume of developer that you use.
It's recommended that you start by using 5mL of Rodinal at 1+100. I add 1mL for every stop that I'm pushing the film. But, generally, I'll overexpose film by 1/3 to 2/3 and use 5mL per roll at 1+100. Soup for an hour.
Again, the timing doesn't matter as long as exhaustion has been reached...The fact that massive dev chart uses differing times for any particular ISO leads me to believe that whoever put it together doesn't understand Stand Dev technique.
Originally by user67377. Source · Licensed CC BY-SA 4.0
user67377
6y ago
0
Generated from our catalog & community — verify before relying on it.
For Rodinal 1+100 stand development, a practical starting point for HP5+ at EI 800 is about 100 minutes—roughly midway between the listed 400 and 1600 times. That said, the shared advice here is that with stand development, time is often less critical once you’re past about an hour because development approaches chemical exhaustion. In other words, extending from 60 to 90 or even 120 minutes may not change results much.
A key point from the answers: with stand development, development is influenced as much by total developer amount as by time. A common starting point is 5 mL of Rodinal in a 1+100 dilution, adjusting developer volume if negatives are too thin or too dense.
Best practice is to test before developing important rolls. If possible, shoot a test roll of HP5+ at the same EI, cut it into sections in the dark, and try a time near the middle of the published 400 and 1600 times, then adjust based on your own results, temperature, agitation method, and preferred negative density.
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