Bausch Thick articulating papers with progressive color transfer are pressure sensitive. The Harder the Bite, the Darker the Mark®. They are impregnated (not coated) with special hydrophilic waxes and FD&C colorants for marking in wet or dry fields. These unique papers produce a field of markings with graduated color intensity corresponding to occlusal pressure. Only high spots, indicated by dark blue or dark red markings, are adjusted.