We suggest wood or laminated cardboard wrapped with a band of .003 ml acetate. Acetate must be taut. Use cellophane tape to affix acetate to art pack. Refer to a crush proof box of cigarettes for weight and craftsmanship. Pay close attention to anything that could hamper vending.
Most people mount their art on wood blocks.
Large .003ml rolls of acetate can be found at office depot. This will make your product slide out of the machine without jamming. Think of what best describes your work with very few words. Column may be labeled R due to content.