Museum Grade Storage Boxes for 11 x 17" Prints/Posters. 18-1/4 x 11-3/4 x 3". BLACK. Drop front. Acid-Free, Lignin-Free, Buffered. 60 Pt. Barrier Board.
Museum Grade Storage Boxes
18-1/4 x 11-3/4 x 3" BLACK.Drop front. Use for Photos, Prints & Posters
The archival material used for these boxes is 60 point, solid-core, acid-free, lignin-free cellulose fibers. It is buffered with a 3% calcium carbonate, which blocks migrant acids, The boxes have a pH of about 8.5. They have metal-edged corners and ship assembled. Boxes have passed the Photo Activity Test certifying that they are safe for indefinite storage of prints & photos.