Pyrocat HD/HP5/Jobodrum

[Laurent L]

Hello,

could you give me a base of time/degrees/dilution to start to develop (HP5+ used to 200 ASA) and TRI X 320 with of Pyrocat HD in a tank Jobodrum 3000 /CPP2 (slow speed).

I have find this time : 13 mn/75°F/2+2+100, but I it seems to me that it is much.

Thank you

Laurent L

 

[Jim Noel]

Laurent,
The developing time is dependent on your printing process. This time seems appropriate for Kallitpe, VDB and palladium. Possibly a little long for platinum and some other processes.

The only real answer is to test and find the time which works best with your equipment and printing process.

 

[Laurent L]

Thank you Jim,
it was for Platine/Palladium process.
Laurent

 

[don sigl]

Laurent:

I develop hp5 in a 3005 expert drum in Pyrocat between 6-7 minutes. Speed is 400. I use the negatives for silver printing. You will probably want to increase development time for platinum, but I think the 13 minutes is excessive. I'd try around 10 minutes and see what the densities look like. Or use the stronger dilution. Shooting HP5 at 200 is going to give you more density. I'm getting box speed with my jobo and Pyrocat.

 

[Tony Egan]

Here is the curve directly from Sandy King's article - HP5 intended for UV exposure. 13-14 minutes for Gamma/Contrast Index of around 0.7 is recommended for platinum. I used this time on some HP5 negs yesterday in tray development and if anything the time was a bit short. I metered at 400 ISO and could have used an extra stop of exposure also.
Here is the link FYI: http://unblinkingeye.com/Articles/PCat/PCat4/pcat4.html

 

[sanking]

Here is the curve directly from Sandy King's article - HP5 intended for UV exposure. 13-14 minutes for Gamma/Contrast Index of around 0.7 is recommended for platinum. I used this time on some HP5 negs yesterday in tray development and if anything the time was a bit short. I metered at 400 ISO and could have used an extra stop of exposure also.
Here is the link FYI: http://unblinkingeye.com/Articles/PCat/PCat4/pcat4.html

Most of my test results are based on rotary processing at 70-72F. With tray, you probably should increase time by 15-20%.

Also, the CI of .7 is for platinum printing. Most people use a combination of pallaidum and platinum and that requires a much highe CI, about .80 - .85.

Another bit of information I need to share is that the HP5+ tested for that article was made prior to a manufacturing change in the film that Ilford made a few years ago. The current HP5+ has more expansion potential.

Sandy King

 

[Laurent L]

Hello,

thank you for yours answers ; I want the CI near 0.80 also I shall try 2+2+100/19mn/22° and tell you what is happen.

Laurent

 

[Laurent L]

Hello,

I tried 2+2+100/22°C/19 mn/Slow speed and after “speed 4” and I think I am still under a good development. I say that only with the judgment of the eyes ; maybe in the Pt/Pl practice it will be good.
But I think for the next HP5+ development I try at 24°.

Another question : do you think the time for TRIX is inferior or superior than HP5 ? and how many percent.

Thank you