I have many black and white family pictures dating back to the 50′s and to this day they have been in a tote bag. The other day i decided to go over them and most of them have curled up (the quality of the pictures are still good) the photo paper is just bent. What is the best solution to un-curl them?
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You can spread them out flat and put heavy books on them for a few days. Don’t stack them though.
I would put them under heavy books. After they are straightened, store them in an album, or at least a photo box to keep them flat.