Uchida Fabric Markers are acid free, non-toxic, permanent, machine washable, dry cleanable and weatherproof. Draw or paint on any fabric, no ironing is needed. The Fabric Marker allows you to make your own patterns, stencils and shades. Easy-to-use, no mess, no clean-up. Laundry Card- Pigmented ink, dries instantly. The black ink stays on during washing. Writes on most fabric surfaces, especially cotton.