Richard Knoppow wrote:

: "Frank Pittel" wrote in
: message
: ...
: jay wrote:
: : On Mar 2, 1:29??pm, Frank Pittel
: wrote:
: : Joe Makowiec wrote:
: :
: : : On 25 Feb 2011 in rec.photo.darkroom, Frank Pittel
: wrote:
: :
: : : I wish there some good books about prints and
: developers for them!
: :
: : : Ansel Adams, 'The Print'?
: :
: :
: :http://www.amazon.com/Print-Ansel-Ad.../dp/0821221876
: :
: : A very good book and I enjoyed reading the copy I
: have. I'm thinking more in
: : terms of books like the Film Developers Cookbook and
: Modern Photographic
: : Processing. Although most of what's in Modern
: Photographic Processing applies
: : to paper as well as film.
: : --
: :
: : -------------------
: : Keep working dumbo needs the money
:
: : Hello Frank
: : Would I be out of line if I asked; what is the
: "development project"?
: : I mean where are these old films from. If this
: information is
: : condfiential,
: : I'll understand. Just caught my curiosity.
: : (Sorry for any spelling mistakes. My Open Office word
: may have been
: : killed by Microsoft Office. I'll find out tomorow when
: my computer
: : tech
: : guy arrives. But for the moment I have no Open Office
: programs
: : working.)
: : Jay Drew
:
: Not sure how much I can give away in terms of detail but
: someone I
: know bought a large number of rolls of MF that was exposed
: during the
: 60s and 70s. The project is to develop the film and end up
: with
: printable negatives. :-)
: --
: The problem here is to preserve the latent image. Most
: anti-fog agents tend to destroy the latent image, just what
: you _don't_ want. There are approaches to developing film
: with old images. An outfit called Film Rescue has had
: considerable success but is using a propritary method. I
: don't know what they do but evidently it works. I have heard
: that one approach is to use very high contrast developers,
: like process developers, at very low temperatures. While
: hydroquinone becomes inactive below about 55F in ordinary
: developers it does not in highly alkaline solutions like
: process developers. I have no experience with this and can't
: now remember the source but I think it was a reliable one.
: If the film has potentially valuable images I suggest
: contacting Film Rescue and not experimenting on them.


Alas, the thousands of rolls of film means that sending them out to get
processed isn't economically feasable. That it's not my film and the
decisions aren't mine to make. We've been using D76 diluted 1:1 and have
been adding 10ml of 1% benzotriazol per liter of stock D76. That helps but
we're still having issues with fogging but I'm thinking that a lot of that
is the result of age, improper storage and there simply isn't a "chemical"
solution to it.

The solution to it has been to "print through" the fog. While the
benzotriazol hasn't eliminated the fog it has helped improve shadow contrast
and has made the negatives much easier to print.

--




-------------------
Keep working dumbo needs the money