BIC Marking Permanent Markers are designed to leave vivid, long-lasting color on virtually any surface. These ACMI-approved and non-toxic markers feature low-odor, acid-free ink* that is great for marking on metal, glass, plastic, photos, foils, coated paper, and oily and damp surfaces. A molded grip zone enhances comfort and control while writing, while the chisel tip lets you create both broad and fine lines. The BIC Marking Permanent Marker won't dry out even if the cap is left off for two weeks.** *No added acid, no measurable pH **Classic Colors: Blue, Black, Red, and Green. Permanent markers feature a durable chisel point and rubber grip for comfort and control. Markings are permanent on most hard-to-mark surfaces such as glass, metal, photos, foils, coated papers, CDs and most plastics. Fade-resistant, acid-free vivid ink won"t dry out when cap is left off for two weeks. ACMI approved nontoxic.