A synthetic substrate (polypropylene) is born with a non-porous surface that repels water. YUPO offers visual artists an incredibly beautiful canvas to work with. Its glossy and smooth white finish gives artists the flexibility to work on several different mediums for unique and creative results. Painting or drawing on the ultra-smooth surface of YUPO is different from ordinary watercolor paper or drawing paper and will require some adjustments by the artist. The surface can be wiped to restore the original white of the leaf, making it an excellent surface for beginners. What makes it even more unique is its lifting quality. You can go back to a finished table and redo specific areas over and over again. You can build up layers of paint like an oil painter working on a canvas and then remove them to reveal the white of the sheet. Remember that water activates paint, even paint that was applied months ago. Let YUPO dry completely. Spray YUPO with a transparent matte finish spray to seal and protect it. Use a sealer only when your work is finished, as touch-ups and retouches become difficult to perform after sealing. YUPO is a space-age material made in a space-age paper mill. The raw materials arrive by train and are loaded into their respective silos and hoppers for possible transformation into pellets. These pellets are then fed into the patented heating and extrusion equipment. The base and surface layers are formed during the extrusion process, and these three layers are stretched to create a dimensionally stable, biaxially oriented substrate. The countless micro-voids created through this process give YUPO its superior strength, opacity, and surfactant finish.