Quick-drying permanent markers with fine point contain ink that won't bead or smudge. Dry-Safe ink allows the marker to be left uncapped for days without drying up. Write on overhead transparency film or such glossy surfaces as CDs\/DVDs, photos, transparency sleeves, slide frames, cromalins, glass, acrylic and vinyl. Low-odor ink dries in seconds. Ideal for left-handers. Correction pen (sold separately) accurately clears film of all Lumocolor markings. Deleted areas can then be immediately remarked.