Patent ID: 6870557

Claim:
A multicolor image forming material comprising: an image receiving sheet comprising a substrate and an image receiving layer; and at least four heat transfer sheets each comprising a substrate and an image forming layer, each of the heat transfer sheets being adapted to be superposed on the image receiving sheet with the image forming layer facing the image receiving layer and irradiated with laser light to transfer the irradiated area of the image forming layer to the image receiving layer to form an image on the image receiving sheet, wherein the at least four heat transfer sheets comprise a heat transfer sheet (X) of which the image forming layer has a hue selected from the group consisting of (1) a hue having an L* value of 48 to 58, an a* value of 69 to 79, and a b* value 36 to 46, (2) a hue having an L* value of 16 to 26, an a* value of 19 to 29, and a b* value of −63 to −73, (3) a hue having an L* value of 57 to 67, an a* value of −73 to −83, and a b* value of 26 to 36, (4) a hue having an L* value of 65 to 75, an a* value of 50 to 60, and a b* value of 81 to 91, (5) a hue having an L* value of 70.3 to 80.3, an a* value of 73.4 to 83.4, and a b* value of −12.4 to −2.4, (6) a hue having an L* value of 35.4 to 45.4, an a* value of 16.4 to 26.4, and a b* value of 36.5 to 46.5, (7) a hue having an L* value of 38.2 to 48.2, an a* value of 67.0 to 77.0, and a b* value of −36.5 to −46.5, (8) a hue having an L* value of 90.2 to 100.2, an a* value of −3.6 to 6.4, and a b* value of −9.4 to 0.6, and (9) a hue having an L* value of 60.8 to 70.8, an a* value of −5.3 to 4.7, and a b* value of −2.9 to 7.1, each in the CIE Lab color space, and an absolute difference ΔD between an optical density of the image forming layer of each of the at least four heat transfer sheets and a corresponding target optical density is equal to or smaller than 0.2.