Abstract: In a process for recording into a rewritable recording medium of a non-contact type, when adjacent lines or adjacent overlapping lines are drawn by scanning the medium having a reversible heat sensitive color developing layer on a substrate with laser light and a second line 2 is drawn after a first line 1 is drawn, the time between the start of drawing 1 and the end of drawing 2 and/or the width of the overlapped portion r is controlled as the means for suppressing discoloration of the recorded lines by interference between heat remaining after 1 has been drawn and heat generated while 2 is drawn. When characters, bar codes, solid images or figures are drawn into a rewritable recording medium of the non-contact type by scanning with laser light, excellent readability and visibility of the bar codes can be obtained in recording a plurality of line elements.

Abstract: A structure formed of a resin material with a built-in recording medium comprising at least a means for rewriting visible information with a laser light in a non-contact manner; a laminate comprising the structure and a method for recording in the non-contact manner using the structure or the laminate are disclosed. The recording and erasing of information in the recording medium can be conducted by irradiation with a laser light from outside. The laser light transmittance in a used wave length range and the visible light transmittance through a portion of the structure from a surface on which the laser light is irradiated to the recording medium are in a specified range. Surface destruction of the recording medium due to laser light on rewriting visible information, decrease in durability during cleaning, damages on the recording medium during transportation and deterioration in the color developing property due to light can be overcome.

Abstract: An IC tag has a layer of heat sensitive color developing material (I), a layer of material absorbing light and converting absorbed light into heat (II) and a protective layer (III) laminated on the surface of the support successively from the surface, or (II), (I) and (III) laminated on the surface of the support successively from the surface. This structure permits recording and erasing invisible information and recording and erasing visible information, both allowing recording and erasing information in a non-contact manner. The structure is flexible and can have a small size.

Abstract: A method for recording information into a rewritable thermal label of a non-contact type by irradiation with a laser beam is provided. When a prescribed drawing is conducted by irradiation with a laser beam focused on the rewritable thermal label of a non-contact type using an optical scanning apparatus, the optical scanning apparatus is driven continuously without activating oscillation for the laser beam, and the drawing is conducted by activating the oscillation for the laser beam and scanning with the laser beam only when a locus of a laser beam which would be emitted if the oscillation for the laser beam would be active (a virtual laser beam) moves at a substantially uniform speed. Damages to the recording face of a recording medium after repeated recording and erasure of information by a non-contact method are decreased, and the recording medium can be used repeatedly 1,000 times or more.

Abstract: A structure formed of a resin material with a built-in recording medium comprising at least a means for rewriting visible information with a laser light in a non-contact manner; a laminate comprising the structure and a method for recording in the non-contact manner using the structure or the laminate are disclosed. The recording and erasing of information in the recording medium can be conducted by irradiation with a laser light from outside. The laser light transmittance in a used wave length range and the visible light transmittance through a portion of the structure from a surface on which the laser light is irradiated to the recording medium are in a specified range. Surface destruction of the recording medium due to laser light on rewriting visible information, decrease in durability during cleaning, damages on the recording medium during transportation and deterioration in the color developing property due to light can be overcome.

Abstract: A rewritable thermal label of the non-contact type which comprises a transparent substrate, a rewritable thermal layer disposed on the transparent substrate and an adhesive layer disposed on the rewritable thermal layer and enables to rewrite visible information with laser light in the non-contact manner. The label exhibits improved durability in rewriting (resistance to destruction with heat) and improved property for printing while the property for repeated recording and erasure with laser light is maintained and enables to write and/or erase visible information with laser light in the non-contact manner automatically without human labor.

Abstract: In a process for recording into a rewritable recording medium of a non-contact type, when adjacent lines or adjacent overlapping lines are drawn by scanning the medium having a reversible heat sensitive color developing layer on a substrate with laser light and a second line 2 is drawn after a first line 1 is drawn, the time between the start of drawing 1 and the end of drawing 2 and/or the width of the overlapped portion r is controlled as the means for suppressing discoloration of the recorded lines by interference between heat remaining after 1 has been drawn and heat generated while 2 is drawn. When characters, bar codes, solid images or figures are drawn into a rewritable recording medium of the non-contact type by scanning with laser light, excellent readability and visibility of the bar codes can be obtained in recording a plurality of line elements.

Abstract: An IC tag which has a means for recording and erasing invisible information and a means for recording and erasing visible information, both allowing recording and erasing information in a non-contact manner, exhibits flexibility and can have a small size is provided. The IC tag has a means for recording and erasing invisible information and a means for recording and erasing visible information which are disposed on the surface of a support and allow recording and erasure of the information in a non-contact manner, wherein the means for recording and erasing visible information has a layer of a heat sensitive color developing material (I), a layer of a material absorbing light and converting absorbed light into heat (II) and a protective layer (III) laminated on the surface of the support successively from the surface, or (II), (I) and (III) laminated on the surface of the support successively from the surface.

Abstract: A method for recording information into a rewritable thermal label of a non-contact type by irradiation with a laser beam is provided. When a prescribed drawing is conducted by irradiation with a laser beam focused on the rewritable thermal label of a non-contact type using an optical scanning apparatus, the optical scanning apparatus is driven continuously without activating oscillation for the laser beam, and the drawing is conducted by activating the oscillation for the laser beam and scanning with the laser beam only when a locus of a laser beam which would be emitted if the oscillation for the laser beam would be active (a virtual laser beam) moves at a substantially uniform speed. Damages to the recording face of a recording medium after repeated recording and erasure of information by a non-contact method are decreased, and the recording medium can be used repeatedly 1,000 times or more.