Hi guys, I have a set of old pictures of the family I'd like to put in frames and scatter around the house. Most of the photos could not survive after a period of time. They all rotted and discolored, or the color bled, or became yellow. I really don't want the same thing happening to the rest of them since I can't replace these old photos. Please recommend me things I should do or should not do. I really don't know what to do when cleaning or storing photographs.
I wonder if it was the wooden back of the frame which damaged the photos, is it good to put a thin foam sheet behind the picture before closing the frame? I heard that plastic is bad for pictures.
Here's a photo of the foam sheet.

I hope to hear from you guys soon, thank you so much.
I wonder if it was the wooden back of the frame which damaged the photos, is it good to put a thin foam sheet behind the picture before closing the frame? I heard that plastic is bad for pictures.
Here's a photo of the foam sheet.

I hope to hear from you guys soon, thank you so much.