Art shipping boxes are usually constructed of corrugated cardboard, and they resemble pizza boxes. The tops and bottoms are lined with plastic or another heavy material that protects the art from puncture damage. The linings are typically covered with foam, so the frame's front and back are cushioned.
Two factors indicate an art shipping box's quality. The first is the strength of the corrugated cardboard, which is measured by the amount of force required to puncture it. Foam density is the other factor. The denser the foam that lines the box's top and bottom, the better it protects the frame.Learn more about Mail & Shipping