How is a YG hologram mounted and displayed?
A YG hologram (which has only some micrometer thickness of gelatine) is usually recorded on glass plates, properly sealed (final thickness 5 or 6mm), and protected with a strong aluminium frame. Contrary to a photography, a YG hologram has no pigments, no dyes, so is insensitive to the light, humidity, time… You should keep it for your life.