BLACK TRUECORE DROPFRONT BOX 16-1/2 X 20-1/2 X 3 Photo Corners mounting/hinging tissue is a fine

mounting/hinging tissue is a fine

this is how the four sides form:

4" x 6" or 5" x 7"

acid-free and pvc-free polypropylene

BLACK TRUECORE DROPFRONT BOX 16-1/2 X 20-1/2 X 3 Photo Corners mounting/hinging tissue is a fineThese extra durable Drop Front Boxes are designed for the long term protection of prints, documents, artwork, and similar valuables! All Drop Front boxes are made of TrueCore board (tan . 060, with a pH of 8. 5 10. 0 or black . 049, with a pH of 8. 0 to 9. 5). Both boards are buffered with calcium carbonate, 3% reserve. The tan board is light fast and non bleeding. The black board is pigment based and light fast. Both boards are acid free and lignin