OK to use rollo pyro in trays?

[Bob AZ]

I am going to use my Jobo for standard practice but was curious if anyone has tried rollo in trays - what does it do different? I know I could try it myself but don't have time right now.

 

[Jim Noel]

It is my understanding that Rollo Pyro is formulated to withstand, and require, the more vigorous agitation which takes place in a rotary process. ALthough I have used other pr=yro developers in both drums and trays, i have never used Rollo in a drum.

 

[Rick A]

Its my understanding it needs the vigerous agitation to oxidize and stain properly. I believe that Sandy King would have the correct answer to the question.

 

[Kerik]

I've been using rollo pyro in trays for years to process 14x17 film. Works great.

 

[Bob AZ]

how would the negatives differ?

Would tray development result in less contrasty negtives given the assumed less intense agitation, or would it not make much difference because it's a staining developer?

 

[Doremus Scudder]

I've used a similar formulation (achieved by adding ascorbic acid to PMK) in trays with very good results. In fact this "PMK+C" is becoming my choice for Zone System expansions.

I see no reason why Rollo Pyro would not work in trays as well. The main feature of Rollo Pyro is that it does not oxidize as quickly with the increased agitation found in roller processors, thereby eliminating aerial staining. That fact should not keep it from working with less agitation. Contrast is a function of agitation and time, so you'll have to test to arrive at the right development time for your agitation scheme. Try it and see.

Best,

Doremus Scudder
www.DoremusScudder.com

 

[Bob AZ]

Thanks for the reply, So far I am down to 5 min and still overdeveloped. I think I will try 3.5 and 4 in a tray just to see what happens and if that looks promising try again in the Jobo. Testing with the Jobo is slow work. Otherwise I think its back to HC110.