Archival Methods Museum Case 22.5 x 28.5 x 2.5" Deep, Black Buckram with White Lining Case top and bottom is Kappa binder's board (0.1), a bookmaking board with no glue between layers Lined with 10 point acid-and lignin-free card-stock PAT tested and passed Covered in book binding cloth with a moisture-resistant, 100% aqueous acrylic coating Adhesive is pH balanced and buffered,  sulfur content