From: Carl Weese (cweese@earthlink.net)
Date: 08/14/03-02:53:25 PM Z
Ray,
Have you bought a new batch of paper? I find paper is the most common
culprit. A new batch of a formerly reliable paper can hand you nightmares.
If you have not bought a new paper batch recently, it will be harder to find
the problem. If the spots are very black, small, and dense, it could help to
filter your FO and metal solutions. If you cut your paper with metal tools,
that could be spreading metal particles that cause spots.
For etching, technique depends on the paper. With a hard surfaced paper it's
best to "scrape" lightly with a tool like an Xacto knife. On softer papers
(like Platine) it's better to use a very light cutting or slicing stroke
through the spot, then brush the loosened fibers away.
You'll hear lots of other possiblities, I'm sure.
---Carl
--
Web site with picture galleries
and workshop information
http://www.carlweese.com
> From: Ray Bidegain <ray@rbstudio.com>
> Reply-To: alt-photo-process-l@sask.usask.ca
> Date: Thu, 14 Aug 2003 12:47:13 -0700
> To: alt-photo-process-l@usask.ca
> Subject: Black Spots
>
> Hello:
>
> I am a platinum palladium printer and suddenly I am getting a large number
> of prints with black spots. I have not really changed anything about my
> process that I can think of and am wondering if there is a packing order of
> likely culprits. How should I attempt to find the problem. Lastly any
> advise on etching them off the prints I have?
>
> Thanks for your help.
>
> Ray Bidegain
>
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