From: Dave Rose (cactuscowboy@attbi.com)
Date: 04/16/03-07:45:08 PM Z
Dear Jack:
I've had actual experience with one pigment in particular that contradicts
your theory.
Gum printing with Sennelier Mars Black dry pigment (iron oxide), resulted in
very heavy non-image area staining at 1g pigment/12ml gum. When I ground
the same pigment/gum mixture in a mortar & pestle and then printed, the
staining was dramatically reduced.
Another curious effect with Sennelier Mars Black - the staining was heavy in
non-exposed border areas on the test print while steps 9-14 on the Kodak
Control Scale T-14 cleared nicely.
Dave in Wyoming
----- Original Message -----
From: "Jack Brubaker" <jack@jackbrubaker.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, April 16, 2003 1:23 PM
Subject: Re: Mixing a light pigment for gum
> judy
>
> I agree with you its not my point to say that grinding will improve a gum
> print. Quite the opposite. I suspect that not grinding and having a slight
> clumping actually helps the print by keeping the grain size parge enough
to
> not penitrate deeply into the paper.
>
> Jack
>
> > From: Judy Seigel <jseigel@panix.com>
> > Reply-To: alt-photo-process-l@skyway.usask.ca
> > Date: Wed, 16 Apr 2003 14:01:40 -0400 (EDT)
> > To: alt-photo-process-l@skyway.usask.ca
> > Subject: Re: Mixing a light pigment for gum
> >
> > I brush with a stiff round bristle brush to combine the
> > gum and the powder only a bit longer than if it were tube paint -- it
> > seems to work the same as when I mull forever.
>
>
This archive was generated by hypermail 2.1.5 : 05/01/03-11:59:54 AM Z CST