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Round two was to use a thermal laminator and adhesive backed PVC sheets to face mount prints to the acrylic sheets.
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What is the transfer medium?
Laminators can be a real pain, the heat introduces a lot of unknown variables.
My son and I have been trying to adhere copper sheet onto PET plastic sheeting to make a special flexible circuit board for a piece of equipment a friend borrowed (from another acquaintance), then ripped apart when it didn't work and tore the flexible circuit board in half. His options were to ask if we could possibly repair the equipment or replace it with a unit worth over $6K new.
This has been a VERY long process.
That on top of researching which chemicals could and couldn't expose the copper without damaging the PET sheet but one of the biggest obstacles was adhering the copper sheet without bubbles.
I have contacted EVERY electronics supply joint in Australia and every company I found online about this process and no one either could or would answer. Even the major adhesive companies couldn't give me an answer.
After more than a year we found Core Electronics started bringing in the Pyrolux flexible circuit board material (Polyimide with copper bonded) after numerous emails to them asking about this stuff and relevant processes. They bring it in from their head company in New York on order.
Now it's just a matter of getting to the job after spending a considerable sum of money on chemicals and materials and my son spending considerable time going through the processes to get it exposed correctly. The largest hurdle has been getting a suitable mask printed or anythinged, no methods, print with laser or inkjet or the iron on method (which was the least successful method) have so far proven overly successful with heat from printing and processes stretching the transfer sheets and ending up with dozens of masks of varying dimensions.
It's another of those one day things, or my friend can just pay the $6K to replace it for his acquaintance (but he won't). Luckily neither him nor the owner need it because it's an ongoing headache.