Well… I thought this would be fun. I even got the pulsarprofx toner transfer paper and a laminator (GBC H212) because I couldn’t get proper results with my tiny clothes iron, but It did not work.
The transfer paper itself seems OK, release time in cold water is just a few secs, but the laminator just won’t get hot enough. I usually need 15 passes to get the toner to refuse. The laminator can cope with 1.5mm thick F4 material, but its plastic case warped at some spots, it wasn’t made for hot copper it seems. I also had to mod the laminator a bit. Some paper guides had to be removed to avoid blocking.
My last attempt will be to mod the temperature regulation. First I’ll check if I can ‘hack’ the pot to get it hotter. If that doesn’t work I’ll discard the whole method and it’s ‘back to good old UV light + NaOH’.