Flag Taped With Packing Tape For Framing Inside A shadow Box Demonstrates A Non-Conservation Method of Custom Framing. This is an example of the improper way to secure a flag inside a shadow box. Acid in the tape will off-gas and damage items framed. The tape will bleed color and stain the flag brown in time. We see this quick and cheap framing procedure done frequently where costs are cut for PCS gifts.