Re: pigments for gum bichromate
Virginia Boehm (gini@ix.netcom.com)
Tue, 13 Jun 1995 03:45:28 -0700
You wrote:
>
>Has anyone out there experimented with making their own pigments for
>gum-printing (or painting)? The book "Colours of the Earth" (the rest
>of the reference escapes me) describes the "old" technique.... Take a
sample home,
>sift it, grind it with a dab of water, then proceed through several
>sedimentation steps to collect the fine particles.
>
>I tried the poor-man's approximation in some gum prints. Ground brick
>makes a passable red, while ground up "orpiment" - a rather cheap rock