From: Cactus Cowboy (cactus@tritel.net)
Date: 02/11/02-11:33:43 PM Z
Absolutely correct! "Properly sized" is the intended surface for the vast
majority of gum printers.
It's unfortunate that a magazine publisher and frequent contributor to this
list is advocating pigment stain testing on *unsized* papers.
Judy Seigel wrote:
(snip)
> Since we're TRYING to show stain, ideally the paper should be shrunk & not
> sized. A surface size on paper that's never been wet can forestall stain
> on many first coats; the water washes it away & raises the nap, after
> which it stains more (unless given a coat of size).
No, "we're" not "TRYING to show stain"! When I make gum prints, one simple
question I ask is: "what's the maximum amount of pigment that I can use on
the *sized* paper that I print on, without having a staining problem?"
Proving or disproving the propensity of a pigment to stain unsized paper is
irrelevant and confusing, (unless you happen to be printing on unsized
paper).
Best regards,
Dave Rose
Big Wonderful Wyoming
"Quality means doing it right when no one is looking".
Henry Ford
----- Original Message -----
From: "Katharine Thayer" <kthayer@pacifier.com>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: Monday, February 11, 2002 1:15 AM
Subject: Re: Dichromates and staining (was: a funny thing....)
> The discussion here, at least my part of it, and I think Anderson's and
> Crawford's as well, is about staining on a properly sized surface.
> kt
>
> BobWicks@aol.com wrote:
> >
> > The problem of staining appears to me to be is that the paper absorbs
the
> > stain. Where it comes from probably is not as important as doing
something
> > that actually eliminates it. Making the paper so that it does not
absorb the
> > stain can be accomplished by using a dilute coating of Gesso on the
paper
> > prior to coating it with the gum emulsion. There are probably other
> > solutions that can be used to accomplish this, but gesso works. Another
> > approach is to use discarded resin coated photo paper that has been
fixed and
> > washed and this gives excellent results and you will have not worry
about any
> > staining.
> >
> > Bob Wicks
>
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