Full-Backs - Current Comics - 42pt - fits 700

42pt, acid-free, 3% buffered backing board. Genuine acid-free, cellular fiber. Meets strict U.S. Government standards for archival storage. 3% calcium carbonate buffer throughout, maintains a neutral pH. Two sided white. The highest quality backing board available anywhere. Sold in packages of 50. We can also provide any custom size to fit your needs.