Lost Recipe for Medieval Blue Ink Found

Unearthed near Hadrian's Wall: lost secrets of first Roman soldiers to fight the barbarians, Roman Britain

Natural_Pigments

Kevin Peckham Art

Scientists Finally Recreate Mysterious Blue Ink From Medieval Manuscripts

Egyptian blue - Wikipedia

Silver Willow Grove

High Meadows Camp

The Mystery of a Medieval Blue Ink Has Been Solved - Atlas Obscura

Iron Gall Historic Calligraphy and Drawing Ink, 1 Oz

Medieval manuscripts blog: Science

nickyskye meanderings: Medieval blues. The mystery of the magical blue color, solved after 1000 years

Zsidó Múzeum hírlevele #íráséskép

Scientists Finally Recreate Mysterious Blue Ink From Medieval Manuscripts