I've use glossy photo paper for inkjet printing (
Lomond A4 170 g m2 one side is glossy and ather is matt ). Glossy layer sealed microvoids on the toner routs on the copper.
I make routs from 0.12 mm ! I do not move hot iron. I assamble all together with load and turn on iron (therm 130 C) after 20 min I turn off iron and let them cool down 20 min. Then lay pcb to water for 15 min, after that I friction suaface of paper by figer (NOT deattach paper from pcb) and paper rolls in tyni scraps.
Photo of my pcb on my page Sorry, in Russian only.
My Procces
and pic icd2 programmer clone bcp - routes from 0.15 мм