due to the type of printing used to print notes the ink is raised on the paper. Ironing will smooth the paper but it will also flatten out the ridges on the ink. It is very noticable to the experienced eye.
I highly advise you not to do this to notes unless maybe the note is worthless and exceedingly common in issue. Ironing alters and damages the paper surface and ink as Ziggy mentioned. Ironed paper will take on a brittle feeling and may also curl from the heat and pressing, which stretches the natural fibers of the paper.
This is what most people try although it has limited effect. It may help the note lay flat but is never going to return the note to a better condition.
no no and no. unless you want to ruin the note. bend and folds are there for good. i would suggest to just live with them :thumb:
Yes, avoid it. Natural paper fibers will absorb the water, and you cannot control how far they will seep into the note. The note may also dry badly and be very obvious afterward. Go find a circulated note that's been through the washing machine and note the difference.
Whatever you decide to try, an iron, water, etc. can easily be experimented with using common, everyday notes....ie; folds, ink, stains, or dirty paper. Don't experiment with a valuable note.