Need to print a well log? Look no further than 20 lb. Xerographic Prefold Paper with a 8.5" fold from Paper Unlimited. It is the perfect solution for seismic well log printing. Designed primarily for black and white printing, our 18" X 500' rolls of fan fold paper is the premier line of seismic-well log media in the country. Paper Unlimited product number FX20B18F812RW includes 2 Items Per Package.