| 摘要 |
The present invention provides a transfer imaging sheet wherein an image is invisible in visible light but apparent under ultraviolet or infrared radiation. The transfer imaging sheet comprises an imaging sheet having a coating on one surface thereof of an image forming agent selected from the group consisting of an ultraviolet-readable fluorescer and an infrared-readable dye, and a radiation curable composition which undergoes an increase in viscosity upon exposure to actinic radiation. The radiation curable composition is encapsulated in rupturable microcapsules as an internal phase, and preferably, the image forming agent is encapsulated with the radiation curable composition. Images are formed by image-wise exposing the coating to actinic radiation and rupturing the microcapsules in the image areas with the coating in facial contact with a receiver sheet such that the internal phase is image-wise released from the ruptured microcapsules and is transferred to the receiver sheet to form an image on the receiver sheet. The image is then read under ultraviolet radiation with the naked eye or infrared radiation with an instrument designed to read the image.
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