not sticking is a function of time, temp, pressure or substrate
you say it is not time or temp, so that leaves pressure or substrate
medium pressure takes a decent amount of force to close (like crushing a grape),
heavy pressure requires exertion on your part (like crushing an orange)
are there any seams, zippers, etc. on the platen hindering even pressure application?
what is your substrate, are they new from a reputable supplier meant for apparel decoration?
are you using a lint roller, then pre-pressing for 5 secs with the platen just resting on the garment,
before applying your design
when you place your tee on the bottom platen grab the top of the shirt on both sides of the collar an equidistant apart,
then pull onto platen with the center of your hands in a straight line along the center of the platen to the back
now you have a straight shirt on a straight platen, use any measuring device to center where required
make sure your collar is off the platen or use a teflon pillow
you say it is not time or temp, so that leaves pressure or substrate
medium pressure takes a decent amount of force to close (like crushing a grape),
heavy pressure requires exertion on your part (like crushing an orange)
are there any seams, zippers, etc. on the platen hindering even pressure application?
what is your substrate, are they new from a reputable supplier meant for apparel decoration?
are you using a lint roller, then pre-pressing for 5 secs with the platen just resting on the garment,
before applying your design
when you place your tee on the bottom platen grab the top of the shirt on both sides of the collar an equidistant apart,
then pull onto platen with the center of your hands in a straight line along the center of the platen to the back
now you have a straight shirt on a straight platen, use any measuring device to center where required
make sure your collar is off the platen or use a teflon pillow