Archival Methods Blue Gray Archival Corrugated E-Flute Board (13 x 19", 5 Pack)

This 5 pack of Blue Gray Archival Corrugated E-Flute Boards from Archival Methods is 13 x 19", and used to make dividers, shelf lining, print backers, and picture frame backing boards. They are acid and lignin free, and are buffered with 3% calcium carbonate to maintain an alkaline reserve for archival photo preservation.