>I've got a couple of questions about coating papers with gum/pigment mixtures:
>
>- Brush seems to give a rather uneven coating- has anybody tried airbrushes?
>Any
>reason for no using them?
>
>- I still maintain that my coats do not look as black as I would like. Is it
>normal to have dark gray coats, and is multiple printing the only answer to
>getting deep blacks?
Olivio,
Airbrush works well for coating pigment. Spray only the pigmented gum. Do
not spray the dichromate it's too toxic. Use a respirator and good
ventilation to eliminate any pigment/gum particulates you might inhale.
Don't spray any toxic pigments (some greens, maybe others). Brush the
dichromate on and begin airbrush while it's still damp. You can get a
wonderfully smooth coat depending on how good your airbrush technique is.
As a benefit you can spray lightly in the highlights and more heavily in
the shadows for a little more contrast control. It still takes multiple
coats to get good shadows, just not quite as many. You can also use
different colors in different areas.
A further disclaimer:
The individual should always take proper precautions whenever using an
airbrush. Consider ventilation and toxicity of what he/she is spraying and
the threat to self or others.
Shane
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Shane Patterson Dept of Visual Arts College of Architecture
patters@hubcap.clemson.edu Clemson University
Home (803) 287-5320 Office (803) 656-3924
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