Re: paper sizing
nadeaul@nbnet.nb.ca
Thu, 24 Aug 1995 19:55:51 +0300
>> papers which work well without
>> additional sizing would include: Arches Platine, Cranes
>> Platinotype, Cranes Parchmont, Stonehedge, Beinfang 360 velum, Cranes Kid
>> Finish, and others.
>>
>I have heard that Bienfang is currently made with a different (internal)
>size, which makes it less good (or NG) for platinum, though attempts are
>underway to get a run made with the old size.
>
>>As for clearing, HCl works but it is dangerous. For that reason
>
>HCL is awfully convenient and cheap. A gallon of "muriatic acid"
>(construction grade HCL, about 28% I believe) costs $6 at hardware or
>paint store. If it seems too scary to use, don goggles & gloves (with
>litre of fresh water handy) and mix up a gallon 1 to 4 to work out of.
>No powders or stirring, just add water....truly the easiest. And note
>that EDTA isn't exactly baby powder (which itself isn't exactly baby
>powder either, but that's another story).
>
>> citric acid, or Kodak's Hypo Clearing Agent.
>
>That's the first I've heard of Hypo Clearing Agent to clear pl/pd. I
There is a discussion on this in _History and Practice of Platinum
Printing_, 3rd ed. Check the index.
BTW, hyposulphite was and may still be used as an anti-chlor in the
manufacture of certain papers. Twenty years ago I saw paper conservators
use hypo to "treat" weak documents.
Luis Nadeau
NADEAUL@NBNET.NB.CA
Fredericton, New Brunswick, Canada
>thought that was just to make hypo wash out of paper better. "Clearing"in
>pl/pd is to remove residual iron from paper, no? (Mike?) However, some
>paper-developer combinations clear quite well in the developer (eg.
>Bostick & Sullivan ammonium citrate developer on a smooth hard paper), so
>someone could be dutifully "clearing" with Hypo Clear & none-the-wiser to
>the fact that it's irrelevant. (Anyone?)
>
>Judy