Photopolymer Etching (artist proof) (Michael Ast) Tags: abstract etching fineart expressionism printmaking aviary crow crows raven ornithology blackbird ravens abstractexpressionism photopolymer charbonneletwalker tusche photoetching charbonnel artistproof hahnemuhle backbirds photopolymeretching michaelast charbonnelink hanhnemuhlecopperplate
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