It is 16% bulletproof and made of dyes with multiple properties
Noodler's Ink is 100% made in the USA. Archival quality inks in large 3oz. bottles for vintage or new fountain pens. This ink exhibits a halo on certain papers as well as darker shading on the edges of lines. It is 16% bulletproof and made of dyes with multiple properties for a variety of tones under various light. Partially water-resistant and fully forgery-resistant.