So I have a regular customer who likes buying older artwork, which means it's usually frame in some...Interesting ways. Sometimes good, sometimes just slightly damaged, sometimes in awful crumbling mat board. He comes in with a pretty nice piece, and at first glance looks good if a few things that could be a an issue. Nice solid frame that he likes, rag mat. Glass doesn't look archival, but hey, at least it's not broken. The print itself has a slight wave going through it, but that could be caused by age, moisture, or who knows what. He asks me to open it up, and...Cardboard. Cardboard directly sandwiching the original artwork with rag mat on top, and held onto that rag board with a sticky tape all the way side to side. WHY would a framer put cardboard in the back of a frame when they have access to things like rag board?! I can see a customer arguing that they want regular glass instead of UV, but cardboard and tape?! Anyone else encounter something as baffling as that?