Multicolor image forming material

A multicolor image forming material comprising:

• an image-receiving sheet comprising an image-receiving layer;
• and
• at least four thermal transfer sheets differing in color each comprising a support, a light-to-heat conversion layer and an image-forming layer,
• wherein the image forming material is used for recording a multicolor image by superposing the image-forming layer of each thermal transfer sheet and the image-receiving layer to face each other, irradiating laser light and transferring a region irradiated with the laser light of the image-forming layer onto the image-receiving layer, and
• at least one layer selected from the image-receiving layer and the image-forming layers comprises, as a fluorine-containing surfactant, a copolymer (I) comprising following repeating units (A), (B) and (C):
• 9
• wherein
• n represents an integer of 1 to 10,
• x, y and z represent molar fractions (%) of the repeating units (A), (B) and (C), respectively, and x is from 10 to 80%, y is from 5 to 85% and z is from 5 to 85%, provided that x+y+z=100 mol %,
• s represents an integer of 2 to 18,
• t represents an integer of 2 to 18,
• PO represents —CH2CHCH3O—, and
• EO represents —CH2CH2O—.