The Uni-ball Vision Needle contains the new Super Ink, which helps prevent check and document fraud. The exclusive uni-flow ink system provides consistent smoothness and color intensity while delivering waterproof ink to the paper.The pigment based ink bonds to paper fibers and resists chemicals that wash dye-based inks from checks. It is also fade proof and water resistant. Uniball Vision Needle delivers a fine line with no skips. Try it now.