Paper Unlimited's 92 bright, 20 lb. Xerographic Prefold Paper with a 8.5" fold is the optimal solution for seismic-well log printing. Designed to print primarily in black and white, our 9.5" X 500' roll of 8.5 inch fold paper is the premier line of seismic-well log media in the country. Paper Unlimited product number FX20B912F812RW includes 2 rolls per package on 3" cores.