Ilford HP5+ @ ISO 125. how to dev?

[Mucleica]

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By accident I exposed the HP5 at 125 instead of 400. I have HC110 or Rodinal available. Any good experience here, how to develop it decently?

thank you in advance. 
 

It’s a medium format film. 

Edited April 11, 2023 by Mucleica
Additional info

[andybarton]

Try this

https://www.digitaltruth.com/devchart.php?Film=Ilford+HP5%&Developer=HC-110%&mdc=Search&TempUnits=C&TimeUnits=D

and read this

You have to start somewhere and with a single film exposed like that you can't experiment easily. B&W film has a wide latitude, so I'm sure that you will get useable results.

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[Fotoklaus]

With HC110 the developing time might be too short (5Min. for Dilution B and ISO 400) so I would try Rodinal 1:50 at about 5-6 Minutes.

[Pintpot]

Overexposure & underdevelopment should give you a somewhat 'flat' negative, this will be easily corrected in printing or scanned & corrected in post process. What it also should do is give more detail in the shadow areas. As Andy says B/W film has a wide latitude, good luck & do post some results.

[andybarton]

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[BernardC]

8 hours ago, Mucleica said:

By accident I exposed the HP5 at 125 instead of 400. I have HC110 or Rodinal available. Any good experience here, how to develop it decently?

You aren't that far from a normal exposure. You need to give it a little less development so the highlights don't block. I would try either diluting the developer more (less developer, more water to make-up the required volume), or a slightly shorter development time. For instance, if your normal dev time is "8 minutes in Rodinal at 1:50", I would either try 7 minutes, or a 1:60 dilution. You don't need to make a big change, because that will give you low-contrast negatives.

You'll still get dense negatives, but that can be compensated by longer printing times, or more exposure in your scanner.

[BernardC]

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I should mention that you can run a test if these are very important negatives. Expose another roll at ISO 125 and develop it as per my instructions.

[Mucleica]

Thank you all.  Once done I will post thE results 

[Mucleica]

So, I did a 1:41 instead of the B 1:31 dilution of Kodak HC-110.
And then my usual 6 minutes at 20 C with 1st minute constant, and then 10 sek per minute agitation.

The negatives look quite good, not to dense. I expect good results later in Lightroom.
I will post once they are dry and 'scaned' with my Nikon D850.

[Mucleica]

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[Mucleica]

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[Aryel]

Looks like they came out very nicely without blown highlights 👍🏻

I’d tend to photoshop out the scratch on the dog photo as I find it distracting. It is a nice photo!

Edited April 21, 2023 by Aryel