MasterChinese Reusable Gridded Magic Cloth Water-Writing for Practicing Chinese Calligraphy
Quality as advertised guaranteed for items sold by MasterChinese. Made by Tian Jing Tang
This item is much better than the black background one: it's odorless and produces sharper image.
Instruction: Use your favorite brush and write as usual with clear water. In 5-10 mins after cloth is dry all will disappear. CARE: cloth can be washed with water to remove dirt or odor. Don't scrub, wash with hands.