--CHEMICALS FOR SCIENTIFIC RESEARCH; CHEMICALS FOR USE IN MANUFACTURING DATA STORAGE MEDIA; PHOTOGRAPHIC CHEMICALS;POLYMERS FOR USE IN MANUFACTURING DATA STORAGE MEDIA;PHOTOSENSITIVE PLASTICS FOR USE IN THE ELECTRICAL AND ELECTRONIC INDUSTRIES; CHALCOGENTDES FOR USE IN SCIENTIFIC RESEARCH; CHALCOGENIDES FOR USE IN MANUFACTURING;PHOTOSENSITIVE PLASTICS; PHOTOSENSITIVE MATERIALS FOR SCIENTIFIC RESEARCH; PHOTOSENSITIVE MATERIALS FOR USE IN MANUFACTURING AND FOR USE IN HOLOGRAPHIC DATA STORAGE; P...