Gall ink made from medieval recipes.
Nr. 2 (Recipe from 13th century)
Nr. 4 (Recipe from 14th century)
Nr. 6 (Recipe from 1557)
Writing test done on pergaminata with 1mm nib 5x7cm (last picture).
(Be aware the ink darkens after time, it starts of a bit grey and then turn black. The writing test is photographed 24h after the writing.)