Faber-Castell Color Gelatos are luscious acid-free pigment sticks that glide on creamy vibrant color and blend beautifully with or without water. They will work well on light or dark papers, smooth or textured surfaces, even flocked papers and canvas, and with a variety of stamping techniques from traditional direct to stamp to reverse stamping. You'll find more uses as you experiment with them. Pigments come in a twist up tube.