Safe for overlaying artwork, layouts and covering color separations, and transparencies. Consistent in color and clarity, wont discolor. Archival quality, lays flat, dimensionally stable. Sheets, pads, and rolls. - Grafix Dura-Lar Clear Acetate Alternative - 18" x 24" x .020", Single SheetDura-lar Clear Acetate Alternative, 18X24 0.02 -