uni-posca Paint Marker Pen - Medium Point - Set of 15 (PC-5M15C) It is a water-based pigment ink that is non-toxic, lightfast, and waterproof. Set includes: white, light blue, gray, brown, orange, peach, light orange, yellow, pale green, purple, blue, green, pink, red, and black. Unlike alcohol-based marker ink, the ink does not bleed.