Technidol/4X5 Tech Pan in Jobo

[Douglas Broussard]

While this question deals with darkroom procedures, it is unique to large format , hence my posting here. While the archives have many helpful posts and answers on Tech Pan development i n roll form, I'm looking for anyone who may have experience developing Tech Pan sheet film (4X5 in a Jobo CPE2/with lift.) in technidol. Kodak does not specific ally discourage this, but provides no information regarding development times or techniques for this dev/film combo other than 8 min in a tray.

Using Kodak's standard Technidol dilution for 4X5 (which is 1/2 of the dilution for roll film), I tested six sheets--two at 8 min, two at 7 min, and two at 6 mi n--and at the tray development time, contrast was markedly higher at 8 min. At s ix minutes, contrast was a fairly low, and at seven, looks to be spot on.

While you may be thinking "he's answered his own question" I am wondering if any one else out there is using a Jobo to process Teh Pan in technidol and if their results approach mine. I don't have a densitometer, but just from eyeballing con tact sheets made on grade two paper, I think I may have nailed down about the ri ght time. I'm hesitant to test much further because of cost reasons, hence my qu ery.

Thanks,

Doug

[Douglas Broussard]

I apologize for the error.

Not: "Using Kodak's standard Technidol dilution for 4X5 (which is 1/2 of the dilution for roll film)"

But:

Using Kodak's standard Technidol dilution for 4X5 (which is TWICE the dilution for roll film), i.e. one packet of Technidol makes 16 oz working solution.

[David Nash]

Hello Doug

As I've only used Tecnical Pan 5x4" once, I'm not very well qualified to answer - but I'll let you know what I did as far as I can remember.

I wanted to develop for platinum printing where I wanted fairly high contrast and a higher density for Zone I. I took a woodland landscape picture, and used an EI of 20 ISO, 16 ISO and 11 ISO. I then developed for 9 minutes (I think! - my notes were on a now-dead computer system...)

The negs were incredibly sharp, as expected, but maybe too contrasty for normal printing. I think you are probably not far off with 7 minutes.

Here is the procedure I used - from some scribbled notes I found:

20 Degrees Celcius Pre-wet for 2.5 minutes Develop ??? Rinse Stop Bath 30seconds Fix 4 minutes Wash 15 seconds Hypo Cleaning 1.5 minutes Rinse 5minutes Photo Flo 30 seconds Do not squeegee

I do have a magazine article that covers processing with Technidol, and I'll try to find it and let you know what it recommends.