Discover the vibrant, high pigment quality of Liquitex professional paint -- in pen form! The Liquitex Professional Paint Marker features water-based, acrylic paint that can be applied on a variety of surfaces, such as paper, canvas, wood, metal, or glass. The 2mm precision nib lends the artist ultimate control and can produce multiple line thicknesses. To begin paint flow, give the marker a good shake, then gently press down the nib several times on your art surface. Be sure to replace the cap after use!