Flashing: was: Making sense of film curve graphs

All paper has a threshold where image detail will start to show, and any
exposure less than this will not give any indication that the paper's
been exposed. Flashing the paper brings it up to the threshold. It is a
curious idea that we can fog the paper without it showing but
essentially that's what it is. And because it's just an addition of
exposure, like burning-in, it can be done either before or after the
main exposure. There really shouldn't be any difference!
 
Cheers
Kate
-----Original Message-----
From: owner-pinhole-discussion@spitbite.org
[mailto:owner-pinhole-discussion@spitbite.org] On Behalf Of Wolfgang
Thoma
Sent: Wednesday, 1 December 2004 8:37 a.m.
To: pinhole-discussion@spitbite.org
Subject: Re: [pinhole-discussion] Making sense of film curve graphs

Loris Medici wrote:

Hi all,

A couple of weeks ago we had a discussion about making sense of film

curve graphs - scientifically. I found a nice article about the issue

and wanted to share with you (if you don't already know it):

HYPERLINK
"http://wwwcl.kodak.com/US/en/motion/support/h1/structureP.shtml"http://
wwwcl.kodak.com/US/en/motion/support/h1/structureP.shtml

The intended audience is related to motion picture industry but the

principles are the same.

Regards,

Loris.

That brings us back to the discussion point FLASHING:
Kodak claims the following:
Flashing Camera Films. Flashing camera films to lower contrast is a
technique , that involves the application of a uniform exposure to a
film before processing to lower overall contrast of some color films. It
is actually an intentional light fogging of the film. You can make the
flashing exposure before or after the subject exposure.
So, if it works "with some color films" AFTER exposure, it should work
with B&W paper after exposure, too ?
taco

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