A method for reducing the production of malodor in sulfur containing dermatological compositions by adjusting the pH of the composition to between about 6. An oxide masking layer with patterns is formed overlaying the metal layer. Then, the use of a result of the means which has detected the position earlier than another means shortens the position detection time. The sulfonated aliphatic-aromatic copolyesters are useful in forming coatings or films on various substrates, and in packaging. The polymer electrolyte includes a gel-forming polymer electrolyte that includes at least one aziridine ring-containing compound, and an organic electrolyte of lithium salt and aprotic solvent.