From: Dave Rose (cactuscowboy@attbi.com)
Date: 03/11/03-02:56:50 PM Z
Powder pigment is less expensive and it contains no extraneous additives.
IMO, it's the best choice for gum printing.
Dave in Wyoming
----- Original Message -----
From: "Mary Pat McNally" <mcnally@psfc.mit.edu>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, March 11, 2003 7:47 AM
Subject: Re: Pigment mixing
> 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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