[pure-silver] Re: Overcoming backing paper info coming tnrough
- From: Speedy <speedgraphic@xxxxxxxxxxx>
- To: "pure-silver@xxxxxxxxxxxxx" <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 12 Feb 2015 10:08:51 -0500
Just curious. Is the effect more pronounced on one end of the roll more than
the other?
Speedy
Date: Thu, 12 Feb 2015 11:06:21 -0400
Subject: [pure-silver] Re: Overcoming backing paper info coming tnrough
From: bobkiss@xxxxxxxxxxxxx
To: pure-silver@xxxxxxxxxxxxx
DEAR MARTY,
Don't forget that you can use ND (neutral density) filters (glass or gels)
to further reduce the light for your pre-exposure if you need.
I remember shooting a test in the mid 80s using some film Ilford had given
me to try to convince me to use it instead of Kodak. (120 shot in my 'Blad)
The numbers had printed through onto the film and were very visible in the
processed negs. When I complained to Ilford they said they discovered that
some effluent from the inks with which they printed the back paper desensitized
the film in areas with more ink. To me this was yet another example of why I
stuck with Kodak...quality control...rather than use other materials, some of
which I liked better than the Kodak I was using. I just couldn't afford
reshoots!
All this to say that you may be experiencing something similar, effluents
or differential diffusion of humidity or some other desensitization of the film
by the backing paper. Not sure how to over come it except with some serious
Frotoshop work.
Please keep the list informed of what you discover.
CHEERS!
BOB
On Thu, Feb 12, 2015 at 10:49 AM, Martin magid <martin.magid@xxxxxxxxx> wrote:
It was Snoopy I believe who gave me many rolls of outdated Agfa 25 120 film.
This is a great film and the right speed to use in my 100+ years old No. 1
Kodak Panoram. The exposures in bright daylight are right on, developed in
Rodinal. The only problem is that the numbers, circles and lines on the
backing paper come through to the exposed negatives and show up on the print.
Sometimes I'm able to delete the unwanted info with Photoshop, sometimes not,
depending on the background.
In order to minimize or eliminate that problem, I'm thinking of pre-exposing
each exposure against a white wall in dim light using the cameras faster speed.
There are only 2 choices of speed for the rotating f/13 lens, but I've made
inserts for the lens up to f/32, and I think I should use the f/32 insert
because the unwanted images come through very lightly.
Does anyone have an opinion on this problem or my proposed solution?
Marty
Other related posts:
