Quick drying permanent inks won't bead or smudge. Available in brilliant colors in fine (0.6mm), super fine (0.4mm) and medium (1.0mm) line widths. Writes on overhead transparency film or glossy surfaces such as photos, transparency sleeves, slide frames, cromalins, glass, acrylic and vinyl. 4-color set includes black, blue, green and red. 8-color set includes black, blue, brown, green, purple, red, orange and yellow.