From: Mary Pat McNally (mcnally@psfc.mit.edu)
Date: 03/11/03-08:47:23 AM Z
Is there any advantage to using pigments one mixes oneself over high
quality watercolor pigments in tubes? Mary Pat McNally
>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
>
>
>I'm 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
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