... writing board - Water-based, dry-wipe prescription. - Easy to wipe off with wiper, tissue paper - High Brightness neon ... etc - Water-base without toxic, No harmful to skin, - Confoms to ASTM D-4236, EN-71, 7272, CE etc - ... : 0.045CBM/CTN, G. W.: 13.5kgs - To activate-shake well with cap on and upright remove cap ... and press tip to surface several times until tip fills with ink, ...