[pure-silver] Re: Yellow edges
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 25 May 2005 23:22:04 -0700
----- Original Message -----
From: "Dave Valvo" <dvalvo@xxxxxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, May 25, 2005 8:07 PM
Subject: [pure-silver] Re: Yellow edges
> If you put a processed Dmax of a paper emulsion on a drum
> and rotate it so
> that the bottom part of the drum is in an emulsion enzyme
> bath and the top
> contacts a transfer sheet you can try to study how much
> silver is in the
> baryta layer. Silver and gel are transferred to the sheet
> with repeated
> passes until silver and baryta starts coming off too.
>
> Electron microscope slices tend to destroy such delicate
> emulsion
> interfaces but that is another attempt to get at it. RSBL
> is a hard thing
> to measure.
>
> Dave
>
This sounds like a description of an actual experiment.
Do you know if it was ever reported in a published paper? If
there is indeed enough silver halide in the Baryta to
require long fixing times to remove it completely
invalidates the Ilford archival processing method.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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