A drawing is scratched with an etching needle into an acid resisting layer of bitumen+melted wax. The acid 'bites' the scratched lines in the metal plate, a repeated process to obtain more expression. For color or photo-etching several same-size plates are used and printed by hand on the press Bendini Bologna.

dated 1969 until 1981 (click on an image to enlarge an artwork)
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