Hahnemuhle's Photo Rag is a bright white 100% cotton rag, acid free paper designed for photo reproduction. This paper has an amazing D-max (black) saturation, depth and color is best water color paper we have profiled. Paper works with Pigment of Dye based inks. We suggest that you lightly wipe any Hahnemuhle fine art paper with a Polygenex gloved hand, then dust off your papers before print them. We also suggest using some type of protective spray either Lyson Print Guard or Frog Juice.