Australian made Mr. Color Fabric Medium is a water-based acrylic used to make color more adhesive, flexible and workable on all kinds of textiles. For best results mix in a 1:1 ratio with Radical Artify Acrylic Paint or Mr. Color Acrylic Paint. Stir gently to avoid creating foam – if bubbles appear, leave it to sit while the bubbles rise and disappear. Paint on with brush, roller etc, using a thin layer to avoid cracking. Can be machine or hand-washed once dry. No need to heat-set, but heat setting will increase permanency.