Uni Liquid Chalk Markers
Uni Chalk Markers use high pigment, removable ink that can be used on
most sealed surfaces including glass, metal, whiteboards and plastic. Excellent for whiteboard markers, they leave no residue.
The colours are bright and more opaque than many other chalk markers. The pens come in 4 different sizes - a fine, medium, medium chisel and broad chisel.
not recommended for blackboards. The toothiness of blackboard paint holds the pigment and causes staining.