RE: Flashing: was: Making sense of film curve graphs

I don't see why you would use post-exposure anyway - except that if you
use pre-exposure on paper in an easel and don't use the paper straight
away, you can run into problems with the margins of the print, whereas
if you were flashing post-exposure, you could just flash the whole
paper, margins and all.
-----Original Message-----
From: owner-pinhole-discussion@spitbite.org
[mailto:owner-pinhole-discussion@spitbite.org] On Behalf Of Loris Medici
Sent: Wednesday, 1 December 2004 10:39 a.m.
To: pinhole-discussion@spitbite.org
Subject: Re: [pinhole-discussion] Flashing: was: Making sense of film
curve graphs

MessageHi Kate,

I wonder why A. Adams was using (or included in his book) pre-exposure
but
not post-exposure. If he was thinking it's the same thing, he should
have
mentioned that pre-exposure can be substituted with post-exposure. But
somehow he doesn't mention this in his book. Of course, I'm not saying
as
Adams doesn't mention it, such a thing doesn't exist or everything that
Adams said is correct - we know that it's not... especially when it
comes to
alt. processes ;)

----- Original Message -----
From: Kate Mahoney
To: pinhole-discussion@spitbite.org
Sent: Tuesday, November 30, 2004 10:23 PM
Subject: [pinhole-discussion] 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

_______________________________________________
Post to the list as PLAIN TEXT only - no HTML pinhole-discussion mailing
list pinhole-discussion@spitbite.org FAQ at
http://spitbite.org/pinhole-discussion/list.html

---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.801 / Virus Database: 544 - Release Date: 24/11/2004
 
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.801 / Virus Database: 544 - Release Date: 24/11/2004
 
_______________________________________________
Post to the list as PLAIN TEXT only - no HTML
pinhole-discussion mailing list
pinhole-discussion@spitbite.org
FAQ at http://spitbite.org/pinhole-discussion/list.html