RE: Watercolor pigments - pigments to avoid...

I'll chime with a different view here. The pure pigment I recently tested
(Scmincke Graphite) actually stains more with sized paper (2%, hardened w/
formalin). What would be your explanation for this? Could it be I did
something wrong in the sizing step? See what I did below:

- Prepared a 2% gelatine solution (200 Bloom, 15 mins. soak, then heated to
50C and stirred)
- Brushed the solution to a paper evenly, I even made few passes with a
glass coating rod
- Dried the paper
- Hardened (outside) with a formalin solution (15cc to 1.5lt water) time:
2mins (*)

I'm suspecting I did something wrong in the hardening step - could it be
that the formalin solution was weak and/or the hardening bath durating was
too short?

BTW, the sized paper is harder and more shiny compared to unsized paper...

TIA,
Loris.

-----Original Message-----
From: Carmen Lizardo [mailto:carmenlizardo@yahoo.com]
Sent: 12 Temmuz 2006 Çarşamba 19:46
To: alt-photo-process-l@usask.ca
Subject: Re: Watercolor pigments - pigments to avoid...

Hi Matt,
Staining is only an issue if you donÕt size your paper. I had great success
with Daniel Smith and Maimeri blu watercolors, although anything should
give you an image in gum. I also prefer transparent pigments.

Carmen

--- Katharine Thayer <kthayer@pacifier.com> wrote:

> Hi Matt,
> For lightfastness information on watercolor pigments, the best
> reference, always kept current (I hope Bruce McEvoy is young and keeps
> his interest in this project for his whole life, because I don't know
> what the watercolor world will do when he stops keeping this site, an
> absolute treasure trove of information about watercolor
> pigments):
>
> http://handprint.com/HP/WCL/waterfs.html
>
> As for whether pigments are good to use in gum bichromate printing,
> there are lots of myths, but I've used almost every pigment used in
> watercolor paints, and have yet to find one that is incompatible with
> the process. Each pigment has its own printing
> characteristics, so
> it would be important to know what your goal is with a particular
> printing, whether a particular pigment would be able to achieve that
> goal or not.
> Katharine
>
>
>
>
> On Jul 11, 2006, at 9:22 PM, Matt Magruder wrote:
>
> > I dont usually post on here. Mostly just read and
> search when I
> > have a question.
> >
> > so hello and hi.
> >
> > Im curious if there is anywhere online or such
> that lists the
> > different watercolor pigment colors and whether
> they are good too
> > use in Gum Bichromate printing.
> > IE they dont stain or whether they are lightfast
> or not...
> >
> > thanks in advance for any info.
> >
> > matt
> > austin tx
> >
> >
>
>

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Received on 07/12/06-01:54:26 PM Z