| 摘要 |
PURPOSE: To enable a formed image to be ultraviolet- or infrared-readable by subjecting an internal phase of each of broken microcapsules to image-formative release from the microcapsule to transfer an image to an image receiving sheet and to form the image on the image receiving sheet. CONSTITUTION: An image forming sheet 10 consists of a substrate 12 having a microcapsule layer 14 on its surface and each of the microcapsules contains an ultraviolet- readable fluorescent agent or infrared-readable dye and a radiation curable composition whose viscosity increases at the time of irradiating it with active radiation. Accordingly, at the time of partly irradiating the microcapsule layer 14 with active radiation, an image having a shape formed from microcapsules 18 in the unirradiated region, each of which contains an internal phase 16 that is retained in a liquid state yet, is produced in the microcapsule layer 14 after the irradiation. At the time of pressing the microcapsules of the microcapsule layer 14 after irradiation, the internal phase 20 of each of microcapsules 22 in the irradiated region is not released from it, however, the microcapsules 18 in the unirradiated region are broken and the internal phase 16 of each of the microcapsules 18 is released from it to transfer the ultraviolet- readable fluorescent agent or infrared-readable dye to an image receiving sheet and to form the image on the image receiving sheet. |
