[Alt-photo] Re: choice of paper for Pt and gum over Pt prints - was Re: Re: Replacement paper for Arches Aquarelle

[Christian Nze]

Hi all

I m also a user of sulfamic acid. Now I choose the paper I'd like even if
it contains carbonate.
About Irving penn Paper I just can say that paper change a lot. I use to
buy old paper and most of them work with alt process. SO I have some 60
 years old Rives which work great coompapre to the modern one.
Chris


2014-03-01 2:52 GMT+01:00 Diana Bloomfield <dlhbloomfield at gmail.com>:

> Thanks, Serdar.  That's interesting, because the paper I had trouble in
> pre-treating with oxalic acid was Fabriano Artistico hot press, too-- very
> mottled and uneven results.   I just gave up trying it with anything else.
>  But the reason I asked about the Rives, too, is because I've been using
> BFK Rives heavyweight, for gum printing, with no additional sizing at all.
>
> So thanks for the additional information and the link here, too.
>
> Diana
>
> On Feb 28, 2014, at 6:17 PM, Serdar Bilici wrote:
>
> > Dear Diana,
> >
> > In parallel to Stan Klimek's experience with BFK Rives printmaking
> > paper, I had superior dMax with printmaking papers (gravure papers
> > specifically) compared to watercolor papers. Printmaking papers unlike
> > watercolor papers have no or very little surface sizing. They are very
> > absorbent due to lack of extra sizing. They retain good amount of
> > sensitizer, but they can be easily abraded due to lack of surface
> > sizing too. Although the idea of better dmax is attractive, the
> > coating requires more care imo.
> >
> > If you read the previous comments on the APUG forum, you will see Stan
> > Klimek was not able to use Fabriano Artistico TW HP 200gsm with oxalic
> > acid treatment. I had the same experience, that particular paper was
> > the reason I looked for an alternative acid to de-calcify papers.
> > Sulfamic acid treatment works with every paper with every alkaline
> > sensitive process and the paper remains free of acid-base reaction
> > byproducts.
> >
> > P.S. - Irving Penn might have de-calcified his papers and even might
> > have re-alkalized his papers after printing. It is not clear according
> > to this informative post on the same blog. There are more interesting
> > articles on Irving Penn and his prints on the blog.
> > https://artofplatinum.wordpress.com/category/irving-penn-2/page/3/
> >
> > Best Regards
> > Serdar
> >
> >
> >
> > On Fri, Feb 28, 2014 at 6:12 PM, Diana Bloomfield
> > <dlhbloomfield at gmail.com> wrote:
> >>
> >> Okay; thanks, Denny.  I'll give it a try.  I have no idea why I've had
> trouble with it-- but maybe I used an incorrect amount.  I love Rives
> papers, especially for gum, so it would be great to have it for pt/pd, too.
>  If I have some time, I'll try it today and let you know what happens.
> >>
> >> Diana
> >> On Feb 28, 2014, at 11:00 AM, Denny wrote:
> >>
> >>> Pretreating with oxalic acid should be trouble-free, just soak the
> sheets in
> >>> a tray of oxalic acid (I usually use 3%) for about 5 minutes (or until
> the
> >>> bubbling stops if there's a lot of buffer in the paper) and then just
> hang
> >>> the sheets to dry.  This works for me with many papers including the
> 250 gsm
> >>> BFK Rives.
> >>>
> >>
> >> _______________________________________________
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> > Alt-photo-process-list | altphotolist.org
>
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>



-- 
Christan Nze
Fine art photographer
Pixtopap.fr
Chrisnzeart.fr