Gum Over Pigments, Clays article
what kind/brand of pigments are being used? I've always used tube watercolors for gum printing and would like to switch to powdered pigments. I get different results with different brands of watercolors, and I'm sure this is no different and would like to start off right.
Also, what is the technique for spotting alt prints? I've tried and tried with no luck and gave up a while ago, my "spot" always dries down to a different color. Is there a magic ratio of pigment to gum or something? Thanks.