Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
Brad told me about a product for this, works great... It's called Magic Sizing, spray it on, let it sit. 90% of the marks go awayhttps://www.amazon.com/Magic-Fabric-Sizing-Aerosol-Starch/dp/B00KO8HYDE/ref=dp_prsubs_2?pd_rd_i=B00KO8HYDE&psc=1
Bill from Supacolor gave me a call and had some good suggestions, we all seem to see the same thing happening. I have small 6 x 8 press with both the upper and lower platen getting heat. He suggested 295° on the bottom plate, and 200° on the top plate. It's air operated unit, so he said a real quick first press, low pressure, about 3 seconds, which should help keep the transfer sheet from impressing the fabric. Then cover and press again, for about another 3 to 4 seconds. I'll let you know how that goes. To make my day better, I have some UltraColor transfers from TE go over the pocket of some striped oxford shirts. Of course, the stripes are showing through, so they'll probable be a re-do on CAD Printz Soft Opaque. Glad I'm leaving early for the wife's birthday...Steve