Pinit Archival-Grade 18 x 24" Matboard. 100% pure Alpha-Cellulose Core & Back. 4-Ply (.060" thick). Available in 18 colors. SKU: kmb1824sel (0)No Reviews yet Add to Shopping Cart Details 'Select' Archival-Grade Matboard18 x 24" 4-Ply .060" thick. 100% Pure Alpha Cellulose White Core & Back.Buffered, Acid-free, lignin-free.Use for m... Details Back Details'Select' Archival-Grade Matboard18 x 24" 4-Ply .060" thick. 100% Pure Alpha Cellulose White Core & Back.Buffered, Acid-free, lignin-free.Use for mounting 11 x 17", 12 x 18", 13 x 19" images.Choose from 18 matboard colors. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review