From: Dave Rose (cactuscowboy@attbi.com)
Date: 03/10/03-05:31:30 PM Z
Weigh out the powder and then add gum slowly, using a very stiff bristle
brush to mix thoroughly. If you don't mix completely, small pieces of pure
pigment can create unwanted 'streaks' in the print. I like to make 100 to
200 ml bottles of stock pigment/gum solution, e.g. 10 grams burnt sienna to
120 ml gum. Be sure to stir up your stock solution prior to printing, as
virtually all pigments will settle to the bottom of the mix.
An electric stirrer also works very well for mixing pigment and gum. That's
what I now use.
Dave in Wyoming
----- Original Message -----
From: "Henry Rattle" <henry.rattle@ntlworld.com>
To: "alt photo process" <alt-photo-process-l@sask.usask.ca>
Sent: Monday, March 10, 2003 3:52 PM
Subject: Pigment mixing
Iım just about to try using powder pigments instead of tube watercolour for
gum prints. Does anyone have a favourite way of mixing powder with gum
arabic? (i.e, do you need to use a muller or a pestle and mortar to disperse
the pigment properly, or will a palette knife do?)
Sorry if this has been covered before if it has, some guidance to the
archives would help, because they are getting mighty big!
Best wishes
Henry
This archive was generated by hypermail 2.1.5 : 04/22/03-02:37:25 PM Z CST