PENTEL ARTS-Fabric Fun Dye Stick. The fun, easy way to transform natural fabrics with dramatic, unique designs. Brilliant, acid free pigment in easy to use crayon form. Ideal for use with stencils and templates. Works best on natural, light colored fabrics such as cotton, wool and silk. Colors: Pastel. 7 per package. Great for drawing designs on T-shirts and fabrics, these soft and blendable colors are like oil pastels. Heat set with iron for permanency. Non-toxic. The 7-Color Set includes: black, blue, green, red, orange, yellow and white.