Inkpress Duo Matte 80, 2-sided 215gsm 12 mil 5"x7"- 50 sheets Inkpress Duo Matte 80 paper is a double-sided matte finish wood fiber paper with a premier inkjet coating which is both pigment and dye receptive, making it ideal for handling high resolution printing. Duo Matte 80 dries instantly, is water-resistant and light fast - great for portfolios, posters, signs, and advertising. It is 100% acid and lignin free.