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Forty Centuries of Ink (David N. Carvalho); A detailed online textbook

Roman ink article by Alexander Allen In Smith's Dictionary Greek and Roman Antiquities (1875), in LacusCurtius

Roman ink recipe, etc.(MyLearning.Org, Yorkshire, UK)

Iron Gall Ink (Lois Fruen)

The ink corrosion website (KNAW NL)

Ancient and Modern Ink Recipes (David N. Carvalho)

Extensive list of ink recipes

Printing inks and related subjects Online lecture by University of Printing and Media, Stuttgart, Germany

Tips on removing ink stains from clothing

Ink chemistry - by Prof. Joy Kunjappu

Flexoresearch Group Anilox Roller Cleaning Expert