Mended patch must be clean. Put mending patch with shiny side on fabric. Switch off steaming on steam irons. Do not use mending patch on artificial silk, nylon or other artificial textiles. Press mending patch with stronger pressure on mended fabric by iron with temperature adjusted according to characteristic of mended material (the mending patch itself will bear the highest temperature) for cca 15-20 sec period. Let fabric cool off for 15 min.
You can also use for making of various accessories by patchwork technique. Simply iron it over and then sew over. It is colour-fast, firm, high quality. It sticks firmly after gluing but still it is recommendable to stitch it.