Use Bistro Chalk Markers on chalkboards, light boards, windows and windshields. A wonderful way to create chalkboard art to attract attention and increase sales.They are opaque, water based, pigmented, erasable with a damp cloth. The markers are all made in Japan from the highest quality Japanese ingredients with customer satisfaction as the prime goal. These state of the art markers are also light-fast, meaning they do not deteriorate when exposed to sunlight and they retain the most vibrant colors compared to all other chalk markers in the market!