Pre-wash with JOBO? yes or no

[numnutz]

I have just obtained a Jobo expert tank to develop 5 x 4 film with a CPA2 processor. On reading the instructions(!) Jobo recommend a pre-wash I am using Silverprint Pyro I have never used a pre-wash with this developer or any other developers i Have used in the 40 odd years of processing film.

So before I test whether to use a pre-wash can you advise me if I should use one or not.

I notice in this recent thread http://www.largeformatphotography.in...en-development that someone recommends 2 pre-washes.

I will also occasionally be using E6 and C41 processes should I pre-wash these?

I would pre-wash using distilled water

Thanks in advance for any of your observations.

nn

[vinny]

I've never had an issue using a prewash. I have had issues when not using one. The people at jobo wrote thos instructions based on practice.

[Ken Lee]

I renamed this thread to include the fact that you are doing rotary processing.

[Jim Noel]

I use a pre-wash with the Expert drums,especially with pyro developers.
I would not use the same drum for C-41 or E6 processing. I reserve all containers, drums, trays, etc which are used with pyrogallol developers for that process alone. I have another set for pyrocatechin developers. Perhaps I am overly aware of cross contamination but I was burned once many years ago and don't want to take a chance.

[bob carnie]

I pre wash Pyro process

I do not for D76, Microphen, or C41.
I use Jobo Rotary.

[Mark_S]

I prewash everything, but have never had good luck doing pyro in the jobo. I had a phase where I experimented with Pyro, and got the best results doing tray development, but ended up moving away from pyro altogether, and back to a traditional (HC-110) developer (in the Jobo CPP).

[Robert Hall]

I prewash everything. 2-3 minutes.

I do PMK and have 0 issues. ( at least with the Jobo, maybe not in my head )

[Ari]

I use two 1-minute pre-washes for all film, regardless of developer or type of tank.

[jeroldharter]

I have always used a prewash with Jobo. Anywhere from 2-5 minutes with water tempered to the same temperature as the developer.

[dave_whatever]

I prewash E6 and HP5+ and FP4+. But with PanF on 120 I found a weird grain mottle clumping which Ilford suggested was down to using a prewash, so next time I use PanF I'm doing it sans wash.