Acetate cards are a nice change from the usual cardstock base that we have become so accustomed to. It can be finicky at times: lining up cardstock paper with the acetate between; stamping on the slippery surface while being careful not to smudge your image; trying to avoid getting fingerprints on the acetate; creatively covering up visible adhesive on the opposite side of your clear acetate. But it's worth the effort for a special card. I have seen some of the most beautifully stunning cards made with acetate. You can purchase acetate (overhead projector sheets) from an office supply store, such as Staples.