Re: Types of Gum? Dyes instead of pigments?
Nope, and nope, Jacek.
However, there are a number on this list doing Temperaprint, or using
gloy...and, of course, gelatin as in carbon printing. Also albumen.
I don't know why plant dyes wouldn't work if they could be suspended in the
gum, but you'd want to worry about archival colors. Could you test it and
tell us what happens?
Chris
----- Original Message -----
From: "Jacek" <gonsaj@iinet.net.au>
To: <alt-photo-process-l@usask.ca>
Sent: Sunday, October 14, 2007 9:13 PM
Subject: Types of Gum? Dyes instead of pigments?
Hi all,
I was wondering if anyone used another form of a binder in Gum Bichromate
printing. Most of the sources I've read have all used Gum Arabic, though
there are many other that exist Gum tragacanth,Guar Gum, Locust Bean Gum,
Tara Gum, Xanthan Gum etc.
Perhaps a different gum might hold more pigment or give another aesthetic
result?
Other than using watercolour pigments, has anyone tried using dyes? I
presume that a pigment is a insoluble powder, when using gum and exposing
to light the pigment is trapped, where a dye used perhaps the gum can't
trap the soluble liquid? Though is it possible to take a dye and make it
into a pigment? Silly question perhaps? :) I had this idea to use plant
dyes for my colours, wondering if its feasible or not?
Cheers
Jacek