Water based glass paint transforms everyday household glass and glazed ceramic items into functional chalkboards. Use to personalize items such as beverage glasses, mugs, canisters, decorative plates, vases and more. Covers easily the surfaces. Be sure to clean glass before painting. Rubbing alcohol or glass cleaner will work to remove any residual grease left on the piece. Bake for 20 minutes at 180 ° C or air dry for 21 days. Place in cool oven and remove cool. Can be washed in dishwasher's top rack safely many times. Can be applied by brush or sponge. Cleans up easily with soap and water. Non toxic. Certified by EN 71 & CE.