Vibrant And Bold Modern Upgrade To Classic Writing ChalkSuitable For Use On All Non-porous Surfaces Such As Synthetic Chalk Boards, Glass, Plastic, Metal Or Lacquered WoodWriting/Art Work Is Resistant To Smudging And Fade Proof (Once Dry)Simply Wipe Clean With Wet Soapy Cloth Or Cleaner (SECCLEAN-GR) To Reuse Surface