A
permanent marker or
indelible marker is a type of
marker pen that is used to create permanent writing on an object. In general, the ink comprises a main carrier solvent, a glyceride, a pyrrolidone, a resin and a colorant, making it waterproof. It is capable of writing on a variety of surfaces from
paper to
metal to
stone. They come in a variety of tip sizes (ultra fine to wide), shapes (chisel point, bullet tip, and wide bristle), and colors (metallic, or
ultraviolet reactive). Like
spray paint, these markers contain
volatile organic compounds which evaporate to dry the ink. Permanent marker is another name for "waterproof" marker.