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I do all three of these print medias. Embossing is done with a matrix of
raised and lowered areas that poduce negative image of the work intended. By
pressing wet/softend paper (I use rives BFK) on top of this matrix and sanded
wooden dowel press the paper against the edges of the matrix to produce a
raised and lowerd image with just paper.
Intaglio is an etched surface that has grooves or lines that are lower that
the surface. Ink (etchiing) os rubbbed into the lines with a dauber(pad) and
then wiped clean with a series of steps untill the smooth surface is clean but
the incised lines are still filled with ink. The paper is soaked and blotted
and laid in a press and with felts is passed through the press and the paper
is forced into the lines. The result is a clean line print.
Collagraph is a relief of found and created sufaces that can be very thin and
delicate, such as sand, tinfoil, paper, doilies,gesso lines,
string,leaves,etc. These materials are glued to a beveled board and then
gesso, glue and shellac are applied to give strength and to be water tight.
The process of inking is like the etching,by removing ink to create light
areas. With a press the paper is forced into the low areas and an image will
be there with embossed areas as well.
These are breif descriptions, there are some fine books on all these
techniques that show you how to do it and with some experimentation with the
press you will be in business.
San Jose, CA