🇬🇧 en it 🇮🇹

gall-nut ink noun

  • 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
 inchiostro ferrogallico, inchiostro metallo-gallico
Wiktionary Links