From: Robert W. Schramm (schrammrus@hotmail.com)
Date: 01/19/03-09:04:09 AM Z
Chris,
Cyanotypes have long been known for fading as a result of strong light but
if placed in the dark for awhile are supposed to come back. There are those
who consider them non-archival but I disagree because I have a cyanotype
postcard that is postmarked 1900. It is over 100 years old and shows no
signs of fading. I would think that strong UV light would cause almost any
print to fade in time except a monochrome (black) gum print and a platinium
print.
Bob Schramm
Check out my web page at:
>From: "Christina Z. Anderson" <zphoto@montana.net>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: Alt Photo List <alt-photo-process-l@sask.usask.ca>
>Subject: cyano and Future floor polish
>Date: Sat, 18 Jan 2003 16:43:49 -0700
>
>Judy et al,
> I left the cyano with Future on it out in the Montana sun for a
>couple
>days. I covered half of it up, and had both the Future part and the
>non-Future coated part exposed to the sun. The more navy color of the
>cyano
>that the Future produced has remained so--it did not revert to the
>turquoisish shade either covered or sun exposed. But on both cyanos there
>is a marked difference in density (in other words, fading) that occurred
>from the sun exposure. Do cyanos normally fade with strong sun? I thought
>they were quite archival.
> P.S. Still haven't received my MSDS from Johnson and Johnson even
>tho
>they said they'd fax it that night.
>Chris
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