A document processing system is provided that renders digital image data in individual pages, where each individual page is rendered to a bitmap page and a corresponding control string. The liquid crystal panel shows less discoloration of images even when the screen is viewed from oblique directions. A gamma characteristic of the medium is determined based on the reproduction gradation pattern, and a modulation pattern produced using easily separable luminance values determined based on the gamma characteristic is displayed on a spatial light modulator to record data in multi-values into the medium. The invention is also applicable to the treatment of rheumatoid polyarthritis or asthma. The apparatus is equipped with a roll 135 capable of performing a relative movement with respect to the table 47 supporting the wafer W, and is arranged to stick a peeling tape ST to the web material LS with the roll, and then winds to peel off the tape; thus, only the adhesive sheet S is left on the wafer W.