The poster isn't referring to inactive chemicals, just one that doesn't
perform as advertised when it is active.
----- Original Message -----
From: "SteveS" <sgshiya@xxxxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Wednesday, May 03, 2006 11:21 AM
Subject: Re: pyro processing
Well Lew, who has never heard ot 'bad pyro' read this outloud and never
again be able to say that.
I got some pyrogallol powder that didn't react to the film and there was
'no' development. Bud at the Photographers' Formulary replaced it (after
some testing) without question.
I develop large format negative material with a three part pyro developer
formula.
Steve Shapiro
----- Original Message -----
From: "Marjorie Nichols" <marjorie@xxxxxxxxxxxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Wednesday, May 03, 2006 5:26 AM
Subject: Re: pyro processing
thanks lew, is DiXactol a pyro developer ?
my hunch is that it is, as you said, in the incorrect processing of pyro.
no one has said it's the developer itself but i am guessing that pyro
has to be processed in a particular otherwise it is vulnerable to black
spots in the printing.
i just want to verify whether or not incorrect pyro processing can lead
to black spots in the prints ?
i don't have the problem with color film or with B & W processed by the
same
or by other labs in non pyro developer.
thanks, m
On May 3, 2006, at 1:24 AM, Lew wrote:
I don't believe that this is caused by the pyro itself; I've never
heard of 'bad' pyro. Pyro itself is a single chemical component of many
developers. I've used a number pyro developers, some from the Formulary,
some I've mixed myself. I've had a black spots on prints issue with
Formulary DiXactol, but that may be my fault. In this case the problem
does not seem to have been with the pyro, but, rather, in the way I
processed my film. Since the Formulary distrubutes a number of pyro
based developers, it's important for your lab to give you the name of
the specific formula they used. I'd be suspicious if they refuse to give
you this information.
On the other hand, I wouldn't let the lab blame a botched job on 'bad
pyro.' It was their responsibility to test the solutions in the first
place.
----- Original Message ----- From: "Marjorie Nichols"
<marjorie@xxxxxxxxxxxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Tuesday, May 02, 2006 2:37 PM
Subject: Re: pyro processing
it's been processed by a lab.
they have mentioned photographer's formulary to me regarding
print developers but that doesn't necessarily mean the formulary
is their source for pyro.
please tell me whatever you know re: any of the developers.
thanks, marjorie
On May 2, 2006, at 1:59 PM, Lew wrote:
Yes, which developer, specifically, are you using?
----- Original Message ----- From: "Marjorie Nichols"
<marjorie@xxxxxxxxxxxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students"
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Tuesday, May 02, 2006 10:58 AM
Subject: pyro processing
has anyone experienced very small spots on pyro processed
negatives - 35 mm ilford hp 500 ?
the spots print black and usually, not always, are on light areas
of the prints.
AND
found a solution to the problem ?
many thanks,
mn
