Whenever I need fabric to be super stiff I use Sta Flo straight, no mixing. I will apply sta flo to all of the fabric, lay it out and let dry for a bit then iron dry. I can see how this would interfere with printing on fabric. When printing on fabric you want the ink to soak into the fabric. Any type of starch product will prevent that from happening. I'm just not sure I see the benefit of this product for that price. Of course, there are a lot of people unaware of Sta Flo starch. For super stiff fabric you could do like the military, mix wood glue and water.