Permanent, removable tissue markings
Permanent, removable tissue markings
Photo-erasable data processing forms and methods
Photochromic material, photochromic device and method for record
Photochromic paper with improved bistability
Photochromic paper with improved bistability
Photoerasable paint and method for using photoerasable paint
Photographic copy method and materials
Plate precursor for lithographic printing plate, method for...