> Hello
>
> This is probably a silly question, but anyway: does dry pigment have to
> water-soluble to be suitable for gum printing?
>
Per, pigment isn't water soluble at all -- very fine particles remain in
suspension in whateever your medium is -- water, gum, oil, egg, etc. Dyes
dissolve in water and aren't suitable for gum printing since they dye the
paper.
Judy