Museum Grade Storage Boxes for 20 x 24" Images. 24-1/2 x 20-1/2 x 3". TAN. Drop front. Acid-Free, Lignin-Free, Buffered.

Museum Grade Print & Poster Storage Boxes
24-1/2 x 20-1/2 x 3"
TAN.Drop front.
Use for 20 x 24" prints and posters.

The archival material used for these boxes is 60 pointpoint, 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 the indefinite storage of photos.