I'm Cyma JEON, President of SE JEONG, VP of Meridian Corporation ( www.meridiankorea.co.kr ) in Korea, manufacturing inprovement education environment tools such As chalkbaord films, whiteboard films, Window films, Deco films, White projection sreen film, safety film, security film, Chalks, marker pens, sketch pad sheet. Specially our chalks on textures after made cloths are fully washed by water. our products are cleaned by the water for chalkboard, whiteboard, chalks and marker pens. Also we have been supplying our products at schools in Korea as the clean environment of schools based on without toxic, dustless, no powders. Our chalks and marker pens are being used 4times longer then too. To save so much your purchasing expenses, you can easily and quckly replace old the surface of each board with our each board films.