Sharpie Chalk Marker Sets Primary Sharpie Chalk Markers write on chalk boards, glass, whiteboards, ceramics, windows or mirrors, simply wipe off with a wet cloth. Colors are opaque.The 3-Color Primary Set includes red, blue and bright yellow. Bright Opaque Liquid Chalk Colors! The Sharpie Chalk Markers are ideal for writing and drawing on blackboards and glass. The […]