1The special fabric will have traces of residue. It can be rubbed with hot water of 60 degrees centigrade or more, and the trace will be eliminated. 2Due to the difference in fabric texture, the fading effect will be different, and it will be tested before use. 3Store in room temperature, softening above 58 degrees- centigrade. 4Long-term storage surface will fade, but does not affect normal use. 5The chalk has chlorination, water sensitivity, steam ironing quick elimination.