Shiny marks appear when heat and pressure flatten the fibres or slightly melt the surface, especially on dark shades, polyester and textured knits. They show as a glossy rectangle around the print.
They can be reduced with matte protective paper or textured Teflon, lower temperature, shorter time and a final press with a textured sheet. On pique and french terry, marks are harder to see than on single jersey. If shine remains, light steaming or brushing may soften it, but test on a sample piece.
heat pressshinemarks
