Magic chalks, self-erasingWith its magic chalk in white, Prym offers traditional dressmakers chalk in a self erasing form. This vanishing chalk marks particularly delicate fabrics, which cannot be washed, with no problems for the purposes of sewing and dressmaking. The chalk markings disappear of their own accord after 2 3 days leaving absolutely no residue and can where necessary be removed by ironing straight away. Important: before using the marking pen on new fabrics, test