zinc-printinghttp://www.oed.com/dictionary/zinc-printing_n%3Ftab%3Dmeaning_and_usezinc printing, n.
First published 1921; not fully revised

zinc printingnoun

  1. 1875–
    1. 1875
      Zinc printing..can be applied with great advantage for certain purposes in the etching style, for maps, plans,..&c.
      R. Hunt & F. W. Rudler, Ure's Dictionary of Arts (ed. 7) vol. III. (at cited word)

Originally published as part of the entry for zinc, n.

zinc, n. was first published in 1921; not fully revised.