ZIG? Memory System? is the premier line of markers designed specifically for scrapbooking and crafting, and has been continually named the best marker among scrapbookers and crafters. Each of the markers features pigment ink that has been tested for archival quality. All are acid-free, lightfast, colorfast, waterproof, fade-proof, non-bleeding and smear-proof, once dry. Writer markers have a dual tip featuring a fine tip (0.5mm) and bullet tip (1.2mm). It is perfect for all types of creative lettering.