SANFORD BRANDS-Uni-ball 207. The Uni Super Ink in these pens helps to prevent check washing and other document alterations by actually becoming trapped by the paper fibers. Ink is also fade and water resistant; acid free; archival safe and features beautiful vibrant colors. This package contains four medium point (0.7mm) retractable Uni-ball pens with comfort grips: blue; purple; red and black. Endorsed by Frank W. Abagnale: Security Document Expert. Imported.