protective box before adding the aluminum foil. – Choose a cool, dry place away from light: no damp basement, no cupboard nearby.of a radiator and no windowsill in the sun.
A small, waterproof box can also work wonders. And if you have a safe, that is of course the ideal solution, provided it is in a dry room.
Aluminum foil on banknotes: does it really work?
Let’s be honest: there is no solid scientific evidence that this method is the most effective. Aluminum blocks light, that is certain, but it