Re: Fortepan

Hi Sandy, sent a note to your e-mail address thanking you! Susan.
----- Original Message -----
From: "Sandy King" <sanking@clemson.edu>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, March 06, 2004 8:58 AM
Subject: Re: Fortepan

> Susan,
>
> The color of the stain you get with PMK varies a lot with film and
> water so there is nothing unusual about your experience.
>
> I definitely recommend against putting the negatives back into the
> used Pyro as the last step. Any stain added to the film at this point
> is B+F stain that does not enhance the printing quality of the
> negative in any way.
>
> And my personal opinion is that PMK is far from an ideal developer
> for alternative processes. With most of the alternative processes we
> need negatives with a lot of contrast and the only way to get that
> with PMK is with very long development times or by using the
> developer at high temperatures. And long development times can result
> in an increase in B+F stain from oxidation.
>
> Sandy
>
>
>
>
>
> >Hello Sandy, thank you for the very informative article!
> >I hope you can put me on the right path with an answer to my question...
I
> >use POP with negatives developed with
> >Pyro- Hutchins formula by the Formulary. My nega have always been of a
> >yellowish-brown hue. I never get green
> >stain. Am I doing something wrong?
> >Also; do you reccomend not placing the negs back into
> >used Pyro as the last step?
> >PS. I only wash my negs for 5 mins. due to water restrictions (esp. in
the
> >summer). Thanks, Susan
> >www.susanhuber.com
> >----- Original Message -----
> >From: "Sandy King" <sanking@CLEMSON.EDU>
> >To: <alt-photo-process-l@sask.usask.ca>
> >Sent: Thursday, March 04, 2004 6:26 AM
> >Subject: Re: Fortepan
> >
> >
> >> John,
> >>
> >> The stain produced by Pyro developers is a UV blocker and results in
> >> more contrast because it is greater in the highlights than the
> >> shadows.
> >>
> >> This is explained in some detail on p. 3 of my article on Pyro
> >> developers. Go to http://unblinkingeye.com/Articles/PCat/pcat.html
> >> and for the question of the impact of stain with different processes,
> >> which is really quite complicated, see page 3.
> >>
> >>
> >>
> >> Sandy
> >>
> >>
> >>
> >>
> >>
> >>
> >> >Sandy,
> >> >
> >> >I was responding to the email below. Where you say using ABC does not
> >> >produce a lot of stain. I am confused by your paragraph. You
essentially
> >say
> >> >that by having more film stain you get more contrast...? I was just
> >seeking
> >> >clarification because I have never used Pyro in conjunction with UV
> >> >processes.
> >> >
> >> >Regards,
> >> >
> >> >John
> >> >
> >> >
> >> >> John wrote:
> >> >>
> >> >> Hello,
> >> >>
> >> >> I am bit confused with this line of questioning. Are you saying
that
> >> >> PyrocatHD has less of a staining effect, thus it exposes faster
under
> >UV
> >> >> processes?
> >> >>
> >> >> Regards,
> >> >>
> >> >> John
> >> >>
> >> >>
> >> >>
> >> >>> I am confused by the question. I don't remember anything like
that
> >> >>> being mentioned in my exchange with Cor.
> >> >>>
> >> >>>
> >> >>> Sandy
> >> >>>
> >> >>>> Cor
> >> >>>>
> >> >>>>
> >> >>>> Yes, I have been testing with Pyrocat-HD, and also with ABC
Pyro.
> >ABC
> >> >>>> gives much larger grain than Pyrocat-HD but develops more
contrast
> >> >>>> for blue sensitive processes like AZO and graded papers. On the
> >other
> >> >>>> hand ABC does not produce a lot of image stain so for UV
processes
> >> >>>> you get more contrast with Pyrocat.
> >> >>>>
> >> >>>> Sandy
> >>
> >>
>
>
Received on Sat Mar 6 21:53:23 2004