The imprinted surface is made of high quality paper (154.3 lbs (70 kg). Thick type that is hard to curl when printed. Since the undersurface is not see-through, it is perfect for correction seals. Since it is not cut, it can be cut to any size. ● There is 1 slit in the middle of the back side, so you can peel it off easily. Depending on the printer, the thickness and quality of the printable paper may differ depending on the printer. See specifications for each printer for more information.