| 摘要 |
The present invention provides a heat transfer printing sheet comprising a substrate sheet, and a thermally-expandable ink layer formed thereon, comprising as an expanding agent a thermally-expandable micro-capsule containing therein an easily-volatilizable hydrocarbon, and a binder resin having a number-average molecular weight of 1,000 to 30,000. The present invention also provides a heat transfer printing sheet comprising a substrate sheet, a release-property-controlling layer and a thermally-expandable ink layer comprising an expanding agent and a binder, in the mentioned order. The present invention further provides a process for producing raised images, comprising the steps of superposing, on an image-receiving sheet, a heat transfer printing sheet comprising a substrate sheet and a thermally-expandable ink layer formed thereon, heating image-wise the thermally-expandable ink layer and bringing the heat transfer printing sheet into pressure contact with the image-receiving sheet, releasing the heat transfer printing sheet from the image-receiving sheet, thereby separating image-wise the thermally-expandable ink layer from the heat transfer printing sheet and transferring it to the image-receiving sheet, applying light to the thermally-expandable ink layer which has been transferred image-wise to the image-receiving sheet to expand it, thereby obtaining raised images.
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