Need help developing HP5

[Bosk]

Hi guys,

I've just finished shooting my first roll of Ilford HP5+ which I plan to develop in HC110, but I forgot to change the settings in my lightmeter over to ISO 400 and have gone and shot the whole roll at ISO 100.

So my question then is what dilution & time should I use for developing this roll of HP5+ @ ISO 100 in HC110?

Cheers!

 

[ChrisN]

This is from the Ilford doco for HP5+:

DEVELOPMENT TIMES
If HP5 Plus has been inadvertently exposed at
settings below EI 250/25, the following guide will
ensure usable negatives are obtained. Obviously,
the quality of negatives processed in this way will
not be so high as conventionally processed ones.
Manual processing (min/20°C/68oF) –
accidental exposure only
ILFORD Dilution Meter setting
developer EI EI EI
50/18 100/21 200/24
PERCEPTOL stock 9 9 11

 

[ChrisN]

I didn't think that would display properly - it lost all the spaces!

For 100iso, that's 9 minutes in Perceptol stock.

Not sure how that relates to HC110 - you might be able to find an equivalent on the Massive Dev Chart.

EDIT:

Did some digging on the MDC.

Delta 100 at 100iso shows 9 min in Perceptol, and 6 minutes in HC-110 Dilution B.

FP4+ shows 9 minutes in Perceptol and 7-9 minutes in HC-110 Dilution B.

Feeling lucky? Good luck!

 

[sepiareverb]

Contrast will be lower, but shouldn't be too bad. I'd try a different developer as HC-110 B normal development time is only 5 mintes or so at ISO400- Or move to a weaker solution- perhaps HC-110 E?

Microdol-X works well for HP5 @ 50- run 1:1 for 8 minutes if this was shot outside- I'd try 9 if it was indoors.

 

[markinlondon]

I'd try dilution H for about 6.5 or 7 minutes depending on the light condition. That should get you something reasonable. My standard combo is HP5 @ EI200, which gets 8 minutes in H.

 

[Bosk]

Many thanks for your help guys, I really appreciate it.


I could go ahead and try developing the roll in HC-110 now that you've been kind enough to give me some times to use, but on second thought I do have some D-76 handy - would I be better off developing it in that instead do you think?


Cheers.

 

[palec]

For D-76 I'd suggest high dillution 1+3 and development times between 11 and 12 minutes. But I have never tried this.

 

[Bosk]

Well this story has a happy ending as I ended up developing the roll for 6 minutes in D-76 stock and am very pleased with the results! (thanks again to everyone who gave me their suggestions)


Below is one of the shots, of the car after the recent very heavy snowfall here in Ballarat - heavy by Australian standards that is!