Do I need to heat set my fabric paint?
In general, the answer is yes. Iron at the appropriate temp for the fabric you painted on. However, Lumiere, Neopaque, and the JSI professional screen inks all self-cure in 72hrs. and a heat set is unnecessary. If Airfix is added to Textile, Airbrush, Dye-Na-Flow or Versatex, it too will set by itself in 72hrs. All paint treated with Airfix should be used within 3 hrs. of mixing.