Pinit Museum Grade Backings for Large Comics. 8-1/2 x 11-3/8". .040" thick. Acid-free, Lignin-free, Buffered. All white. SKU: KAF40875 (0)No Reviews yet Add to Shopping Cart Details Museum Grade Backing Boards 8-1/2 x 11-3/8" .040" thick Use for Large Comics All white. Lignin-free. Acid-free. Buffered. Contaminant-free. Meets th... Details Back DetailsMuseum Grade Backing Boards 8-1/2 x 11-3/8" .040" thickUse for Large ComicsAll white. Lignin-free. Acid-free. Buffered. Contaminant-free. Meets the Library of Congress archival standards. Indefinite Storage. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review