From: Keith Gerling (keithgerling@att.net)
Date: 12/10/01-10:53:06 PM Z
Well, Judy, I'm pretty sure I'm not imagining this: I experience no
bleaching at all. I'm well aware of the bleaching qualities of dichromates,
and have seen the bleaching in action on factory made silver gelatin paper.
Having used many (probably at least 20) different papers, I have experienced
different colors, tones, contrasts, clearing qualities and other assorted
surprises, good and bad, when printing gum over Van Dyke and kallitype - but
not bleaching. For primarily environmental reasons, I allow my first gum
wash tray (and my second), to become VERY loaded with dichromate.
Essentially, my prints end up soaking for hours in a dichromate solutions.
No bleaching. What more can I say?
I'm not sure what you mean in your last sentence. I do size the paper after
applying the VDB, else the gum would never clear. The problem I am
experiencing now is one of clearing out the highlights in the VDB/Kallitype
component.
-----Original Message-----
From: Judy Seigel [mailto:jseigel@panix.com]
Sent: Monday, December 10, 2001 10:01 PM
To: alt-photo-process-l@sask.usask.ca
Subject: RE: Van Dyke & Gum
On Mon, 10 Dec 2001, Keith Gerling wrote:
> I have done a considerable amount of gum printing over Van Dyke as well as
> kallitype. Even when printing multiple layers of gum, I have never
> experienced any changes in the contrast, tone, or overall density of the
> underlying silver. Actually, my biggest problem with this approach is
Keith, what the hell are you doing (right or wrong???!!!). Gum contains a
silver bleach, the bichromate -- vdb has silver. I've never seen or heard
of gum over vdb without at least SOME bleaching. Putting some kind of size
over the VDB ought to be as child's play in comparison. !!!!!
J.
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