PyrocatHD 400TX Jobo

Peter De Smidt

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I'd like to develop 120 400tx in a Jobo at 75* F with Pyrocat HD 1 + 1 + 100. Does anyone have a starting point for development time testing?
 

sanking

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Peter De Smidt said:
I'd like to develop 120 400tx in a Jobo at 75* F with Pyrocat HD 1 + 1 + 100. Does anyone have a starting point for development time testing?
Click to expand...

How will you be printing?

And is that TRI- 320?

Sandy King
 
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Peter De Smidt

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Hi Sandy,

With a diffusion enlarger on graded SG paper. It's 400tx and not the 320.
 
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erikg

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Is this a jobo ATL? I have a time at work that has worked well for me. I'll send it along tomorrow morning.
 

sanking

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Peter De Smidt said:
Hi Sandy,

What would you suggest for the 320? (I do have some 4x5 320 Tri-x that I might use down the road.)
Click to expand...

Peter

For printing with TXP-320 on a graded #2 silver paper I would suggest about 11 minutes at 72F with Pyrocat-HD 1:1:100, with rotary processing.

Sandy
 
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Peter De Smidt

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Just to report, I tried 9 minutes at 75*F with the Jobo on the slowest rotational settings. The negatives look pretty good. Perhaps they're a little on the contrasty side, but it's hard to tell without printing. (I only have a BW transmission densitometer.) I'll probably try 8 minutes next time if the lighting is at all contrasty. There's quite a bit of stain. (My BW densitometer say fb + fog is .33) Recently, I've been using Pyrocat with Maco Infrared (both the old stuff and the prototype) and Rollei infrared. Neither of these films showed much stain.
 

JLP

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Sounds likely that your negs are on the contrasty side. I develop TXT 320 in a jobo on a beseler motor base in Pyrocat MC 1+1+100 10 minutes 68C and those negatives are good for Pt/Pd printing and a grade 1 silver paper. Great combo by the way.


jan
 

Thomas Bertilsson

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In regards to the Tri-X 400, since you're in a jobo tank, you want to probably shorten this time appropriately, but with Pyrocat-HD 1+1+100, I've developed at 70*F, 8 minutes, after exposing the film somewhere around EI 160-200 to avoid a flat toe. Prints really well on grade 2 papers.
But of course the time depends on how the light is. My latest batch was in very bright sunlight, but I changed the agitation instead to every three minutes instead of every minute. That really helps hold the highlights back.
And I see a lot of stain on Tri-X film too, but don't judge until you print them.
- Thomas
 
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