What type of pigment do you recomend.What manufacturing company is
the best.
I used watercolor pigment.This pigment was in tube.I don't have a
scale, so I made the mixtures using ml.The first print was done with a
dilution of 1ml of pigment and five of gum.Then one part of this solution
with one part of dicromate.
The gum solution:
300g powder gum
1000ml of destilled water
15 ml of 37%formaldeyde solution
The sensitizer formula is:
13g of potassium dicromate
75ml of water
This formulas are from THE GUM BICROMATE BOOk DAVID SCOPICK FOCAL PRESS
ISBN 0-249080073-7
The print was exposed, and then developed.I let the print in a wather bath
for 10 minutes, and then with a brush, brushed it, so the unexposed parts
would disolve in the water.Nothing happened.
I reduced the exposue to the half in this case five minutes in
direct sunlight.I had the sam e probelms.
Then I used 1ml of pigment with 9ml of gum.One part of this
solution + 1 part of the sencitizer soution.
I exposed two prints, In this case the only diference was the color
of the print, and that in the print that i exposed 7 minutes, the edges,
that were not exposed, were removed my the brush.This parts that were
removed were the parts were the masking was.The pigment from the print, was
brushed, but no pigment fell off.
Then I reduced the pigment 1ml of pigment and 11ml og gum.I exposed
the prints 10 minutes and 4 minutes.In both cases in the development non of
the pigment fell off.
I really don't know if the problem is that i am not developing
right, that the expousures are to long, so the emulsion is all harden, that
i am not using the proper mixture of pigment.
Thanks for your time
Alan Kleiman
akleiman@infoabc.com