From: Carl Weese (cweese@earthlink.net)
Date: 01/24/02-11:29:42 AM Z
Tillman,
This is apparantly only one of several problems that recur with the
"flourescent white" version of Crane 90# cover. Cranes knows about the
trouble (as of conversations I had with them a year or more ago) from their
support line and strongly recommends against using this paper for platinum
printing--"natural white" works well, the whiter white does not. When I
tried it, the paper was erratic, producing first a good print and then a
harsh and gritty one next try. Don't recall if I encountered bleeding with
it. You sure that in the past you've been using an other-than-natural-white
90# Cover with consistent results?---Carl
--
web site with picture galleries
and workshop information at:
http://home.earthlink.net/~cweese/
----------
>From: Tillman Crane <tillman@tillmancrane.com>
>To: alt-photo-process-l@sask.usask.ca
>Subject: help
>Date: Thu, Jan 24, 2002, 9:57 AM
>
> dear list,
> i have run across a problem I can't solve.
> I print pt/pd ad I prefer white borders rather than showing the brush
> strokes. i print on crane's 90lb cover bright white. I have used
> this paper for years.
>
> in the past several months I was able to print with white borders.
> When I bought new paper all of a sudden i couldn't get clean white
> borders. metal from the image bed into the white area.
>
> i use both pot oxalate and ammonium citrate developers. i tired
> coating with 1% ox acid as a precoat, better but not solved, i tired
> filtering my developer, no change. finally i mixed new ammonium
> citrate developer, presto white borders. BUT as the developer aged
> the bleeding began again.
>
> the bleeding doesn't show up on cranes cover natural white, only on
> the bright white. do you think soaking the paper in oxalic acid
> rather than just a precoat would help?? anyone else run in to this
> problem?
>
> what i can't figure out is what changes as the developer ages and
> picks up extra metal. as long as the developer is clear, then the
> borders are clear. but as the developer picks up color the bleeding
> begins. does it have something to do with the changing ph of the
> developer? the bleeding continues when I add fresh developer to the
> old developer.
> any ideas?
> thanks.
> tillman crane
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