Pinit BACKINGS for Current-Day Posters. 24 x 36". .125 thick Archival Corrugated. Acid free & Buffered. Indefinite Storage. SKU: KSPAC (0)No Reviews yet Add to Shopping Cart Details Current-Day Poster Backings .125 thick Archival Corrugated. Indefinite Storage. B-Flute "Banner Blue" corrugated material. Acid-free, lignin-free. Bu... Details Back DetailsCurrent-Day Poster Backings .125 thick Archival Corrugated.Indefinite Storage. B-Flute "Banner Blue" corrugated material. Acid-free, lignin-free. Buffered with calcium carbonate. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review