A crosslinkable, pre-adhesive composition is described comprising an acid-functional acrylate copolymer and an aziridine crosslinking agent, which when crosslinked provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles. Distribution of the mask pattern is measured and adjustment is made so that a desired image of the pattern is projected onto the substrate according to distribution of the exposure light incident into the liquid between the projection optical system and the substrate when exposing the substrate. Then, for each bin, a statistic indicative of samples classified into that bin is maintained. In another embodiment, the device contains two or more hair coloring chemicals, at least one in at least one receptacle within the device.