ASLAN C-pen is a white liquid chalk pen for writing on blackboards. Specially designed for writing on the PremiumBlackboard ASLAN BB 910 and ClearChalk ASLAN CR 63 blackboard films. Unlike traditional chalk, the liquid chalk pen does not smudge or blur and it does not produce any dust. The C-pen’s writing is bright, easy to correct and easy to remove with a damp cloth.