Perfection Master (PMC) Tailor Crayons are wax-based with a tapered, groove finish ... this box is from the 1930's ... Used generally for button holes or slot marking on heavier fabrics ... Add decorative touches, draw stories or transform old sheets, towels and clothing using crayons. Yes, those sticks of colored wax called crayons can be applied to all types of surfaces, including fabric. You can create original designs and patterns or trace favorite shapes, artwork and cartoon characters onto fabric with ease with crayons to make wearable and usable art. Apply simple drawing techniques to obtain colorful designs that are then heated and permanently adhered to the fabric.