To clean your skin
after marking, simply rub vigorously to mute the colour or use a damp
cloth or baby wipe for complete removal.
The chalk will
wash out of most clothing or martial arts Gi in a normal wash, however,
pre-treating with detergent sprays or pre-wash stain removers will often
assist. The chalk does contain pigment and therefore risk of permanent
staining is possible. It is recommend before use on Gi or good clothing,
you mark the clothing in a discrete location and see if it washes off.
Of course, the use of old clothing that you don't care about is