You dont have to worry about a white square showing through your vellum paper when you use these clear mounting squares from 3L Scrapbook Adhesives. These mounting squares are archival-safe and they set up permanently so your craft projects last. The tabs are dispensed from a uniquely designed box and the adhesive squares are easy to move for the first few hours, at which time they become permanent. These are excellent for attaching die cuts, paper shapes, punches, or anything else you can think of. There are 500 mounting squares with peel-off paper backing included in the box.