repoussage

noun
re·​pous·​sage | \ rə̇¦pü¦säzh\
plural -s

Definition of repoussage

1 : the art or process of hammering out or pressing thin metal from the reverse side
2 : the hammering out of an etching and photoengraving plate from behind to level up any part that has been worked into a depression

History and Etymology for repoussage

French, from repousser + -age

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