Re: Lith film

We might be confusing density range with exposure range again. It is too
easy to get a density range of 3.2 or higher for lith film that it is
considered so problematic that low-contrast developers have to be developed.
The problem is usually not low density range but low exposure range, that
is, with normal developer, the steps that you can separate on lith film is
quite low (probably just around 1.0 or about 7 steps using "normal"
developer or diluted paper developer).

The key is to use super-low contrast developer for the interpositive and
then you can use stronger or strong developer for the final negative if you
need high density range for the final negative.

Dave S

P.S.: Hi all. I will eventually cancel my AOL account and my old email
address fotodave@aol.com, so please use this new address for correspondence.
Thanks.

----- Original Message -----
From: "Monnoyer Philippe" <monnoyer@imec.be>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Thursday, December 11, 2003 10:35 AM
Subject: RE: Lith film

> Clay,
>
> I checked it. The link shows an abstract rather then a paper. No process
mentioned, no curves.
> I believe you saw Pt/Pd print made with PMK processed lith film. I also
believe they retain all the subtleties in tone that you
> could want for this process. What I hardly believe, is that this was
printed without contrasting agents. I want my neg to suit my process.
Therefore I need a density range (w/ or w/o stain) adapted to pure
palladiotype.
> My point is: there is no lith film / developper combination that will
provide that 3.2 density range (visible light density).
> My tests and curves I received today confirm that.
>
> Philippe
>
> -----Original Message-----
> From: Clay [mailto:wcharmon@wt.net]
> Sent: Thursday, December 11, 2003 16:03
> To: alt-photo-process-l@skyway.usask.ca
> Subject: Re: Lith film
>
>
> I really don't agree that the lith film approach is a total dead-end
> for making enlarged negatives. I have seen real-life results from
> several workers (e.g. Stuart Melvin, Bob Herbst, Michael Kravit) who
> are producing long scale pt/pd type enlarged negatives using APHS that
> are very fine indeed, and retain all the subtleties in tone that you
> could want for this process. Naturally, it takes a little practice and
> a lot of care, but dismissing this approach completely is a little
> premature. For instance, check out :
>
> http://www.bostick-sullivan.com/Technical_papers/
> Stuart%20Melvin's%20Pyro%20System.html
>
>
> Clay
>
>
>
Received on Thu Dec 11 18:36:51 2003