Marvy Uchida Primary Set Fabric Markers. Create amazing designs on most fabric surfaces with the Primary set Fabric Markers. This set of 6 contains primary colors of pigmented, water based fabric ink that is permanent, and light fast on most fabric surfaces when dry. There is no heat set required. The durable, specially designed tip allows you to do both thin and thick lines. Try these on lighter colored T-Shirts, Hats, Canvas Shoes, Back Packs and more.