wonder if that would harm a private key printed on regular paper. I use Revla paper (thanks to DaveF) and I am sure that would not be affected by this method. makes me question any second hand coin now...
I’m going to slap a laser jet printed QR code and an ink jet printed QR code under some holos and try this myself as I’m curious. I’ll send you a vid/pic of the QR codes and holos when I’m done and we shall see what they look like after and see if they are readable.
Try with the 99.5% if you can find it. In theory it will unstick the hologram the fastest while doing the most damage to the ink and paper.
If the QR survives that then you know that the lower concentrations would not harm it.
Obviously it would be best if we could test many types of paper & printers and inks and so on.
But that is just not going to happen.
-Dave