[pure-silver] Re: (sligthly OT) Film flatness in a film holder
- From: Ken Sinclair <photo1@xxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 4 Apr 2007 08:00:36 -0600
On 4-Apr-07, at 2:50 AM, <C.Breukel@xxxxxxx> <C.Breukel@xxxxxxx> wrote:
Hi,
(snip)
The one sheet I developed and printed did seemed less sharp
compaired to
the Rollei Infrared sheet I exposed at the same time. But the
prototype
film was a bit overexposed and under developed.
Mybe I should slide an old 4*5 flat sheet undeneath the thin film?
Best,
Thanks,
Cor
Cor,
When Kodak introduced Technical Pan film (in sheets), there was a
similar problem,
since the first batches were of a thin support support material.
Their staff then recommended that users should fully expose and
process a separate
sheet of Tech Pan film and place it behind the unexposed sheet in the
film holders to "cure"
the problems of curvature of the film in the film holder and the
associated Depth-of Focus
problems. It worked quite well.
Ken
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