Xerox may not work for you. In the past I had done some experimental work
with xerox. What I noticed was that the water beads up on the areas where
the dry pigment sat. Similar results with laser printers. Ink jet will give
nice tonal results but will bleed as you feared. The best combo might be
inkjet will a healthy covering of workable fix. Let us know if you find a
method that works for you.
>I noticed in the Listserve that you have xeroxed pen and ink works onto
>watercolor paper. When you apply watercolor over the xerox does it bleed and
>run through? I work in gouache and do a full tonal drawing on watercolor
>paper and then paint over it. The tonal drawing acts as an underpainting and
>is very detailed. I often do not want to cover up the drawing because it is
>nice just as a graphite drawing. I have thought of a way that I could keep
>the original graphite drawing and paint on a copy so I could have both. Do
>you have any suggestions?
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