Noodler's Ink Refills Heart of Darkness 4.5oz w/ Free Fountain Pen Bottled Ink - ND-19808 Heart of Darkness is a combination ink that absorbs as much of the color spectrum as could be engineered with an average penetration rate - BULLETPROOF.
This listing is for a 4.5 oz. eyedropper glass bottle of Noodlers ink in Black - Heart of Darkness. This ink is all U.S. made and boasts Archival Anti-Forgery and Anti- Feathering features -- what the manufacturer calls Bulletproof.
The ink is specifically designed for fountain pen use. The Charlie Pen that is included with this 4.5oz ink is an edition released in response to the 2015 Charlie Hebdo attack in France. This Noodler's fountain pen fills via eyedropper. Fill up the clear plastic barrel with Heart of Darkness or your other favorite Noodler's Inks. The cap on each pen consists of swirling, colorful resin that will vary from pen to pen.