ZIG Opaque Pens. These opaque pens feature a special formulation of UV absorbers that thoroughly block all light waves to prevent exposure. Even-flowing nibs lay down a rapid drying, thin film that does not creep, spread, crack or chip.
 
Key Benefits:

• Waterproof, smudge-proof and light-proof.
•  Four point styles for ease in matching the pen to the job - Ultra Fine point, Fine point, Bullet (Medium) point and Wedge (Broad) point.