While magnetic or “sticky” albums were a quick and easy way to make photo albums, they used an acidic adhesive to attach photos and mementos to the pages. The acid in the adhesive on the pages damages the photos, while they are so sticky that it can be difficult to remove photos and papers without damaging the document and the plastic page protector adds to the damage further by helping to contain fumes given off by the pages.
To remove photos from the albums use a piece a waxed dental floss and carefully slide under the photos, starting in one corner to separate the photo from the album page.