Dura-Lar is the acetate alternative, combining the best features of Mylar and acetate. It is always consistent in color and overall clarity, won't discolor with age, and always lays flat. Dura-Lar’s Wet Media Film has been newly formulated and treated on both sides to accept paint, marker, pen, and airbrush without beading, crawling, or chipping. Pads contain 12 medium-weight (.004"), archival-quality sheets that are non-yellowing, non-tearing, and dimensionally stable.