Our corrugated board is a light blue-gray in color. It was developed to provide strong, rigid panels meeting archival quality. The 12-1/2 pt. caliper paper used in the manufacture of these panels is of a special acid-free, lignin-free quality of excellent strength characteristics which has been buffered against acid migration. A water-resistant, modified starch adhesive of neutral pH is used for corrugating. The panels are fabricated in single wall (1/8"), double wall (1/4"), and cross laminated double wall (1/4") construction.