From: Kerik Kouklis (kerik@kerik.com)
Date: 08/12/03-11:24:40 PM Z
Mark,
The only advantage to the Clearprint is that it's available in thicker
varieties than the Mars (Clearprint 1020 and 1025...)
Most of the vellums I've tried have been prone to black spots. Helix Vellum
was the worst. My batch of Mars is moderate... hard to use for images with
lots of high key areas. The Clearprint I have is the cleanest. Still I
usually have a few spots to etch out when the print is done. The good news
is that the vellums are fairly easy to etch and leave almost no evidence
behind.
Black spots are generally attibuted to metallic contamination (likely iron)
within the paper fibers.
Kerik
-----Original Message-----
From: Ender100@aol.com [mailto:Ender100@aol.com]
Sent: Tuesday, August 12, 2003 8:58 PM
To: alt-photo-process-l@skyway.usask.ca
Subject: Re: Pt/PD Paper for Superior resolution
Thanks to Clay, Jeff and all who responded. I think one of these might
have been used by Keith Schreiber on some work when I last visited him. I
thought it had outstanding resolution and a wonderful glow to it.
Is there any advantage to the Clearprint Vellum over the Mars Vellum?
Clay you said that the Mars might be prone to the "dreaded black dot
syndrome"? Has anyone ever figured out what causes this?
thanks again for the help!
Mark Nelson
In a message dated 8/12/03 1:32:56 PM, wcharmon@wt.net writes:
Mars vellum or Clearprint vellum. The hard surface of the vellums come
close to silver gelatin clarity. And they are cheap, to boot!
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