Iron Gall Calligraphy Ink

Iron gall ink is a historic ink that has been widely used since the Middle Ages for writing and drawing. It is made from a combination of gallo-tannic acid extracted from oak galls (small growths on oak trees caused by wasp larvae) and iron sulphate. The ink is initially pale when applied to paper but darkens to a deep, rich black or dark brown as it oxidizes.

This ink was favoured for centuries because of its permanence and resistance to fading, making it a popular choice for official documents, manuscripts, and artworks. Iron gall ink is known for its fluidity and smooth flow, allowing for fine, precise lines in both calligraphy and illustration.

Constituents
Gallo-tanic acid, iron sulphate