An image-receiving sheet comprising a base sheet and a receiving layer, provided on one surface of said base sheet, for receiving a dye or a pigment migrating from a heat transfer sheet, said base sheet comprising one or two or more layers, at least one layer of said base sheet having a porous structure...http://www.google.com.au/patents/US5336657?utm_source=gb-gplus-sharePatent US5336657 - Process for heat transfer recording
