A medical pressure-sensitive adhesive composition having excellent re-adhesion property, and also excellence in both the peel adhesion property and the low skin stimulus property, a process for producing the same, and a medical tape are provided. The glass substrate polishing method is characterized in that the polishing processes include a first polishing process in which the surface of the glass substrate is polished using a first polishing pad made from a polishing cloth and a second polishing process in which the surface of the glass substrate is polished using a second polishing pad made from urethane foam. Moreover, the memory system has a data processor configured to derive the payload data from the read-out status using the reliability information. This may not only simplify the identification of molecular structures of the organic molecules, but also use exact mathematical model for mixture samples to derive both structural and dynamic parameters plus their variation. The monitoring provides calibration, feedback, andor source aging information to insure robust and reliable performance for the multispectral illuminator.