Fabric Fun Pastel Dye Sticks 7/Pkg-Assorted Colors Sold as 7/ST. Pastel dye sticks offer a bright, easy way to create fun fabric designs. Acid-free pigment in an easy-to-blend crayon form lets you draw or stencil a design on a piece of fabric to create your own designs. Drawings become permanent once heat-set for convenient use. When heat-set, your design is washable. Dye sticks work best on natural and light-color fabrics.