Re: Pyro

JROSEBOROUGH (JROSEBOROUGH@Prodigy.Net)
Tue, 13 Jan 1998 21:19:53 -0800

Carl Weese wrote:
>
> David,
>
> <<<
> I use JOBO for my 4x5. I have noticed that anythinh uneven in Pyro
> probably has
> much to do with agitation and/or presoaking. When I presoaked for 5
> minutes (vs.
> 1 or 2 for most other devs) I found that everything looks much better,
> especially
> with films that have heavy anti-halation dyes.>>>
>
> Are you using the revolver-style Jobo Expert Drums? If so are you using
> the top rotation speed on the Jobo, or something lower? If it's the 3010
> drum, how much solution do you use?---Carl

If I may ad my 2 cents worth. I am a PT/PD printer who uses PMK with the
8x10 Jobo Expert drum and seem to have little problems. No uneven
staining etc. The development time is split so that for the frst half
the the chemistry comes from #1 bottle and for the secound half of the
time the chemistry comes from #2 bottle. This seems to reduce aerial
oxidation. Chemisrty quantity is 1L for all solutions used. The rotation
speed is 25 on the ATL-2. This combination works OK for me. HP5+ and TMY
produce good megs with an EI of 200.

I am cerious as to what B/F densities you guys are getting. For me HP5+
is about .30 and TMY is about .22 reading the Blue scale.

Happy printing,
John Roseborough