@PaulaMc007@MsRuffles We used to use Gentian Violet back in the day, but given we also used mercurochrome, it's probably not a good idea to use it unless someone still in the field recommends it too. I second pineapple (or third as the case may be).
@PaulaMc007@triciamcginnity Scan them and have them made into a photo book, then you can read them as often as you like, without damaging the originals ( that you will have framed 😊)