U of S | Mailing List Archive | alt-photo-process-l | Re: archivalness of gum

Re: archivalness of gum

From: BOB KISS <bobkiss@caribsurf.com>
Subject: RE: archivalness of gum
Date: Fri, 21 Dec 2007 10:38:02 -0400

> Ryuji, can you help with this?

Probably not...

If your silver gelatin print was toned with a sulfiding agent
or at least with a selenium toner, the chance of silver
migrating is very slim and I'm more inclined to the light
theory than silver migration theory.

> Could this be what was seen with the pt/pd prints or did
> someone actually test the faint images on the interleaves to
> confirm that they were pt/pd metal?

Different material, different condition, therefore I can't
compare them meaningfully. However, testing whether the ghost
image was due to the partial transfer of the image or
otherwise should be fairly straightforward.

Ryuji Suzuki
"Patriotism is the last refuge to which a scoundrel clings."
(Bob Dylan, Sweetheart Like You, 1983)