This Sharpie® Permanent Marker uses an AP certified nontoxic formula, making it safe for use. You can use it to write on posters, mirrors, photos, CDs and more. The quick-drying ink of the black marker reduces the chances of smearing or smudging. Its fine tip enables clear strokes and smooth writing. Permanent on most surfaces, this Sharpie® fine permanent marker can be used for your art and craft projects.