Heavyweight 100% vat-dyed sulphite with longer, stronger fibers. Tough enough to take scoring, folding and curling without cracking or tearing. Superior fade-resistance keeps projects brighter longer. Acid-free for archival quality. Construction Paper Combo Case—Each carton contains 32 packages of 9 x 12 and 8 packages of 12 x 18 heavyweight construction paper. Sheet/Roll Size: Assorted; Sheet/Roll Size Assortment: 9 x 12; 12 x 18; Paper Basis Weight (lb): 76 lb Text; Paper/Media Color(s): Assorted.