Noodler's Black Bottled Ink was designed for people who use absorbent paper and the priority is about feather-resistance vs. drying time. The thicker formulation does increase drying time, but performs great when trying to achieve solid, non-shading lines. Black ink Size - 3oz Bulletproof: This ink is water resistant on cellulose-based papers and resists all known tools of forgers, including UV light, bleach, alcohol, and other solvents. This ink may still be vulnerable to smearing when exposed to water Eternal: Made to resist the effects of time, this ink is archival, fade resistant, and unaffected by humid or acidic conditions Because Noodler's inks are hand made in small batches, the colors can vary slightly from one bottle to another Noodler's Inks are filled to the brim - take care when first opening to avoid ink spillage