Water based acrylic. Xylene and lead free ink is light fast and waterproof when dry.
2mm tapered bullet tip.
Great for writing and drawing on non porous surfaces such as glass, plastic and chalkboards. Marks can be removed from non porous surfaces by using ammonia based window cleaner. Posca Markers can be used to make permanent marks on porous surfaces like wood, plaster, clay and posterboard.
Permanent on porous surfaces and erasable on most smooth non-porous materials.