Re: Printing gum on hard surface

"(...) what I'm after; what I need and what I'm making is
hardened gum that replicates as closely as possible the hardened gum in
a gum print, so it needs to be the same thickness as I would coat it to
print gum."

Since substrates like glass do not absorb water, you might have to change
the concentration of your coating solution...

Martin

----- Original Message -----
From: "Katharine Thayer" <kthayer@pacifier.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Friday, September 03, 2004 10:24 PM
Subject: Re: Printing gum on hard surface

> Dave Soemarko wrote:
> >
> >
> > But that is if you are interested in a piece of hardened gum.
>
> Well, actually, I'm not at all interested in a piece of hardened gum,
> although I'll be interested to see if you manage to make one. No, a hunk
> of gum isn't what I'm after; what I need and what I'm making is
> hardened gum that replicates as closely as possible the hardened gum in
> a gum print, so it needs to be the same thickness as I would coat it to
> print gum.
> Katharine
>
>
> If not,
> > probably your test on mylar or non-glare glass is sufficient.
> >
> > And typing this is making me so wanting to do some tests, but maybe I
should
> > not....
> >
> > Dave S
> >
> > ----- Original Message -----
> > From: "Katharine Thayer" <kthayer@pacifier.com>
> > To: <alt-photo-process-l@sask.usask.ca>
> > Sent: Friday, September 03, 2004 7:37 AM
> > Subject: Re: Printing gum on hard surface
> >
> > > Dave Soemarko wrote:
> > > >
> > > > > The chemist I'm working with thought it would
> > > > > be a simple matter to coat glass with dichromated gum, expose,
wash
> > and
> > > > > dry it and then peel off a sheet of nice hardened gum. Don't I
wish!
> > > >
> > > > Oh, sorry I didn't read this email before replying to the previous
one.
> > If
> > > > you want a piece of dry hardened gum, maybe you could try coating it
> > > > thickly, expose, and do something similar the carbon transfer,
except
> > that
> > > > this is a gum transfer. You can transfer it to a piece of pure
glass, or
> > the
> > > > slick side of mylar.
> > > >
> > > > But I haven't done that myself. It's just a suggestion.
> > > >
> > >
> > > Well, I actually tried that in the interest of making more hardened
gum
> > > faster, but I couldn't make it work. I don't think gum works the same
> > > as gelatin in this regard. And in fact, we all know that one reason
for
> > > failure in gum is to get the coating too thick; it just flakes off. I
> > > put these thicker layers out in the sun and exposed them for a very
long
> > > time, but no go.
> > > kt
> > >
Received on Sun Sep 5 08:37:56 2004