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Collography (derived from the Greek collo, glue, or the French coller, to glue,) is a process invented by Glen Alps in 1955, and it is the only printmaking process to be developed strictly as a fine art medium. The collograph is pulled from a surface built up of adhered (glued) elements in the manner of a collage. The finished plate may be inked in intaglio (the uppermost surface wiped clean), or in relief (only the uppermost surface inked), or in some combination of the two, and is then run through an intaglio press to produce the printed image.