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Re: Permanency of VDB (test)
DEAR DOUG,
Now you're speaking of a different problem, fungi and mold. I know of
what I speak as I live in the tropics, Barbados. Our humidity problems are
year round. They can be ameliorated with a 5% tincture (alcohol solution)
of Thymol or, if you want to be "green", politically correct, and less
toxic, Hyamine 1622, according to the Image Permanence Institute. It
should be the last wet step in processing prints.
Good luck.
CHEERS!
BOB KISS
----- Original Message -----
From: Sam Wang <stwang@mindspring.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Thursday, July 20, 2000 8:58 PM
Subject: Re: Permanency of VDB (test)
> At 8:14 PM -0400 7/19/00, Robert W. Schramm wrote:
>
> >>Longevity,
> >>it seems has to do with the deterioration of the image due to
> >>chemical reactions between those comound which make up the image
> >>and chemical compounds in the substrate and in the air.
>
> Which begs the question again, what if we wax the VDB print with
> Renaissance or similar wax? What if we coat and protect the VDB with
> a layer of colloid such as gum or gelatin? I'm testing the latter but
> it will take awhile to get answers. Problem is, in the humid South,
> even toned gelatin-silver prints are sometimes attacked by fungi and
> mold.
>
> Sam Wang