Product Description Classic iron gall ink. Based on the classic recipe passed down since the Middle Ages, it is made with only the following four ingredients: Ingredients: Fermented oak galls Gum arabic Iron Rainwater No pigments (soot), synthetic dyes, or synthetic additives are used. This is a completely classic formula ink. Features: Color changes depending on the paper quality. The denser the paper, the deeper the black color. Completely matte black after drying. Black with a slight purplish nuance. Highly durable, similar to the properties of ancient document ink. Volume: 20ml Recommended for those looking for classic ink, iron gall ink, and classical ink.