U of S | Mailing List Archive | alt-photo-process-l | Re: Types of Gum? Dyes instead of pigments?

Re: Types of Gum? Dyes instead of pigments?



On Tue, 16 Oct 2007, Keith Gerling wrote:


As for dyes, the biggest problem I've found is that they stain.  Meaning
that if you put some on paper, it won't wash out.
Exactly. That's why they're called "dyes." They "dye" paper, but you don't dye metal or paper so easily.

J.


Keith

www.gumphoto.com

On 10/16/07, Don Sweet <don@sweetlegal.co.nz> wrote:

This chap is experimenting to see whether the plant dyes used in
anthotypes
are reasonably permanent.
http://www.alternativephotography.com/articles/art098.html

Don Sweet

----- Original Message -----
From: "Christina Z. Anderson" <zphoto@montana.net>
To: <alt-photo-process-l@usask.ca>
Sent: Wednesday, October 17, 2007 2:40 AM
Subject: 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