| 摘要 |
PURPOSE:To provide a photorecording material which causes no deterioration of recording characteristic due to oxidation, corrosion, etc. by dispersing such material as being subjected to thermal expansion on heating and the deformed condition can be maintained even after cooling into a resilient rubber material. CONSTITUTION:When a beam 8 of a xenon lamp 7 is projected onto the surface of a photorecording material 4 so as to heat it, substances 6 expand to deform a surrounding resilient rubber member 5. The deformed condition caused by the substances 6 is maintained even after cooling and the surface of the irradiated portion is formed into a projection. Since said projection 9 has different refracting, diffraction and reflecting conditions when compared with those at non-irradiated portion, desired recording can be performed based on the difference of the transmission factor of light. Preferably, a thermally expansive thermoplastic resin, e.g. a thermoplastic resin containing a compound having low boiling point, to be concrete, copolymer particulates of vinylidene chrolide containing isobutane are preferably employed as said substance 6. |
