My dishwasher will be the one who wields the iron (and also has an excellent rolling pin arm
), so I think in the interests of domestic harmony, I'll clean the PCB myself.
Reason I asked about temperature is that there's a note from a previous owner not to put Melamine in Laser printer, but any printed sheet never feels that warm.
However, the laminator idea might be worth looking at for those who use light boxes. Print PCB layout to paper using a laser printer. Then pass paper and laminator sheet through laminator where laser toner should be transferred (in theory) to clear sheet, ready for lightbox.