Development with pyrocat hd in jobo cpe2

[Shen45]

With the CPE2 there is a limit to the amount of liquid the motor will turn in a drum. I believe it is 600 ml. Even that "sounds" a bit like hard work. Don't over load the CPE2 and use it on the fastest setting which from memory is "2".

I process in both BTZS tubes and occasionally my Jobo CPE2+ with the same tank and reels you use. I have no uneven development but I do not pre rinse. The moment the developer has been poured into the tank I shake it very vigorously for at least 5 seconds then put it on the magnetic drive. My tank is not controlled by a lift arm. The shaking is very similar to the initial cocktail shaker action when you begin processing in a BTZS tube and as Sandy has indicated the film is wet almost instantaneously ensuring even development.

One thing - does your reel [2509] have the little black attachments? These apparently help with even development.

I process PMK in my Jobo and BTZS tubes with no problems at all. Just get the developer onto the film as quickly as you can. You will not have problems with staining developers if you get the developer to the film surface in a rapid vigorous manner, actually any developer for that matter. I have used as little as 150 ml in a 2500 series tank with 2 sheets in a 2509n reel with PMK for a normal development time of about 7 minutes. Longer times would be problematic because of oxidation with that small volume of developer. I think maybe I'm fortunate as I get extremely even development, no pre-rinse and minimum developer. Normally 4-6 sheets in 280 ml of non staining developer or 4 sheets in 400 ml of staining developer. Wetting the film quickly and evenly with developer for me is the key. Definitely no pre-rinse.

[Guenther]

Tank you very much for all replies. I think it will help me my development techniques to improve. IŽll try it again.
But for me is not clear when the developer is too old. If I mix the part one and two thank the liquid looks milky and after developing (9-10min.) the liquid is brown.
I mixed the stock of developer 15 month ago with water not with glycol.
Can it be that the developer is oxidized to early during the development?

Best regards
Hans-Guenther

[sanking]

Tank you very much for all replies. I think it will help me my development techniques to improve. IŽll try it again.
But for me is not clear when the developer is too old. If I mix the part one and two thank the liquid looks milky and after developing (9-10min.) the liquid is brown.
I mixed the stock of developer 15 month ago with water not with glycol.
Can it be that the developer is oxidized to early during the development?

Best regards
Hans-Guenther

The working solution should be used within 15-30 minutes of mixing. The color will change from a light beige just after mixing to a deep coffee color in about an hour. If you wait too long to use it the result will be more general stain.

The stock solutions, mixed in water and stored in partially full glass containers, should last for about twelve months. If you plan to use the stock solutions for more than twelve months I would recommend mixing in glycol. You can find information about the Pyrocat variations, with mixing instructions, at the Pyrocat web site. http://www.pyrocat-hd.com/html/mixing.html

Sandy

[Kirk Gittings]

Sandy what do you think the shelf life of stock solutions in Glycol are?

[sanking]

Sandy what do you think the shelf life of stock solutions in Glycol are?

Kirk,

The shelf life of Pyrocat-HD and -HDC mixed in glycol should be at least three years if the solutions are not contaminated. I have a bottle of Pyrocat-HD mixed in glycol that is now five years old and it works perfectly.

Pyrocat Stock A solutions of -HD, -HDC mixed in glycol should remain clear throughout their life. A sudden change in color of the stock solution would be a danger sign that the solution has gone bad, most likely from some type of contamination.

Pyrocat-MC stock solutions mixed in glycol may darken considerably within 6-12 months of mixing but will still work fine for at least two or three years.

For maximum shell life I recommend glass containers.

Sandy

[Guenther]

Hello all,
than you very much for all coments and statements. I ordered propylenclycol yesterday. So IŽll try it again with new developer and more speed with my jobo cpe2
Best regards Guenther

[sanking]

Hello all,
than you very much for all coments and statements. I ordered propylenclycol yesterday. So IŽll try it again with new developer and more speed with my jobo cpe2
Best regards Guenther

Hi Guenther,

IMO the key to more even development is not higher rotation speed. In fact, I usually recommend a moderate or slow rotation with Jobo and other types of continuous rotation in tubes when using staining developers. The key is, 1) beginning development as soon as the developer contacts the film, and 2) some degree of randomizin in agitation by make sure there is change on both the horizontal and vertical axis.

Sandy