RE: color of VanDyke/Longevity?

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From: Keith Gerling (kgerling@ameritech.net)
Date: 06/28/00-09:40:25 AM Z

Thanks, Andre. My own tests, going on six months, offer similar findings.
I'm curious about this bad reputation that Van Dykes and Kallitypes have.
In perusing through the list archives, I notice skepticism concerning
archivality, but nothing substantive. Can anybody point me to hard evidence
that these silver processes lack permanence? Given the high cost of
Palladium these days, it would be (extremely) welcome relief to be able to
switch over to silver.

-----Original Message-----
From: Andre Fuhrmann [mailto:Andre.Fuhrmann@uni-konstanz.de]
Sent: Wednesday, June 28, 2000 9:02 AM
To: alt-photo-process-l@sask.usask.ca
Subject: Re: color of VanDyke/Longevity?

>>
>
>I'm curious what people have found about how long van dykes last?
>Has anyone done tests? I've heard that it should be as permanent as
>regular silver processes. Jamie

(Perhaps a recent message in which I reported my test didnt trickle
through to the list. So here it is again.) In December last year I
have taped a vandyke to my office window, facing the sun a couple of
hours every day (well, on a sunny day). I have covered half of the
print with black carton. As yet there is no visible diffence in the
image. I believe that the carton is NON-archival, containing
hopefully a good portion of acid. So I am testing also what happens
to a vandyke when in permanent contact with non-archival material
under substantial heat. So far nothing happened. That indicates a
good deal of permanence, certainly more than I would expect from a
well-processed baryta print.

Hope you take that as good news!
-- Andre

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