chemigraphy definition

  • noun:
    • Any technical engraving process dependant on substance action; specif., a procedure of zinc etching perhaps not using photography.
    • a procedure of earning zinc etchings without the aid of photography.
    • an activity of acquiring halftones by publishing, from same dish, in two colors, or two tones of the same shade, certainly one of which is slightly off sign-up.
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