Opaque, water-based liquid.
For writing on Blackboard Vinyl, decorating & writing on glass & virtually all non-porous surfaces.
Wipes off with a damp cloth.
Permanent on cloth, leather, paper & other porous surfaces.
3mm chisel point nib.
Sometimes liquid chalk-pens leave a slight “ghosting” behind on the surface once it’s wiped clean. This can be removed with standard house cleaning products. Alternatively, we have also found from customer experience that you can use Coca-Cola to clean the surface!