View Full Version : Technidol/4X5 Tech Pan in Jobo

Douglas Broussard
28-Apr-1999, 16:12
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.



Douglas Broussard
28-Apr-1999, 16:16
I apologize for the error.

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


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
29-Apr-1999, 06:35
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.