Gum problem(s)

Hi all,

I tried a few variants in the pigment / gum ratio and coated to different
tickness directly on paper using various exposition times. None of the
combination I've tried cleared to the paper in masked areas. Also I tried
this with one dark brown watercolor paint tube and one using a dry pigment
(dark brown also). I use a 1:1 ratio of pigment/gum and saturated pot.
dichromate solution.

I also notice the unmask area don't hold much if any pigment either. It's
like some pigments get into the paper causing a noticable darkening and
almost none stays on top of the paper in insoluble gum. My last attempt was
20 minutes exposure under a #2 photoflood light.

Any suggestion on what is the problem(s) and what I should try next?

Thanks
Yves

PS Both pigments I used seem to be of the opaque type if this could help.
Received on Thu Nov 17 20:29:45 2005