From: Phillip Murphy (pmurf@bellsouth.net)
Date: 03/11/03-01:36:21 PM Z
Hello Mary,
Depending on how you grind and blend your pigments and many other factors
including the source from whence they came,
there are varied qualities that you can exploit in your printing that factory
processed pigments can not deliver.
( Think salsa made with a food processor versus salsa made by hand chopping) : )
There's a great listing of resources in the Post-Factory Journal and without
reaching for a copy I can tell you
that Sinopia in San Francisco is a reliable source for a good range of pigments
to experiment with.
best regards,
Phillip
Mary Pat McNally wrote:
> 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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