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Re: Permanency of VDB (test)
Sam,
Good thinking. Especially if the protective coating would also
filter out UV. Ilfochrome prints which are laminated in a UV absorbing
plastic a warrented for 200 years. I assume they did some special
test with strong UV sources in order to make this claim???
Along the same line, it is interesting that probably the most delicate
images (daguerreotypes) have survived probably because they are
immediatly sealed in a protective package after they are made. Modern
daguerreotypists use acid free mat board, glass and acid free tape
to bind the edges and seal the package.
Then theres the old, "Whats the best way to show a print? Under
two inches of water." argument. If you could just devise a noninteractive
coating that seals the image, absorbs UV light and
looks like two inches of water, I, for one, would pay money for it.
Bob Schramm
>From: Sam Wang <stwang@mindspring.com>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: alt-photo-process-l@sask.usask.ca
>Subject: Re: Permanency of VDB (test)
>Date: Thu, 20 Jul 2000 19:58:30 -0400
>
>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
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