gall-nut ink

短语

词形变化

gall-nut inks 复数 gall-nut inks

释义与例句

n.
  1. 1.

    acid blue-to-black ink, blue or purple when fresh, but turning intense black from iron oxidation, containing iron ions and tannic acids obtained from crushed gall-nuts and a solution of gum, or glue, and copperas, slowly replaced carbon ink and used from late antiquity to 20th century