I'm sure others know this, but I discovered you don't need to print directly on the parchment paper for iron on tpu designs
Just print on the build plate, apply stick glue to the parchment paper, press it firmly over the print, and gently scrape from the plate while lifting the parchment paper
for those who asked here's my step by step:
\-Print in 95a tpu 1 layer 0.28 thick (to start make your designs chunkier until you get the process down)
\-Then gluestick the parchment paper
\-apply pressure over the entire design
\-carefully scrape the tpu up while lifting the parchment paper (I use a 4inch putty knife)
\-place the parchment paper holding design on to the fabric you are going to transfer to with another layer of parchment paper under the fabric
\-set the iron on top at the highest setting for 45 sec-minute-as soon as you remember it's sitting there
\-press hard for \~10 sec to set the melted plastic into the fabric
\-let cool
I've done a few tank tops for the kids with designs and they survived a wash/dry cycle with no ill effects #technology source