Patent ID: 7824515

Claim:
A method for image formation, comprising the steps of: (1) providing an intermediate transfer recording medium comprising a base material film and a transfer part provided separably on said base material film, said transfer part comprising at least an optical diffraction structure; (2) providing a thermal transfer sheet comprising a base material film and, provided on said base material film in a surface serial manner, at least one thermally transferable coloring material layer and a separably provided heat-adhesive layer transfer part; (3) forming a thermally transferred image on the surface of the optical diffraction structure of said transfer part of said intermediate transfer recording medium using the thermally transferable coloring material layer of said thermal transfer sheet; (4) transferring said transfer part of said intermediate transfer recording medium that has the thermally transferred image formed thereon in step (3) onto an object; (5) forming a heat adhesive layer on another transfer part of said intermediate transfer recording medium that was next to said transfer part having said optical diffraction structure of said intermediate transfer recording medium used in step (3), using said heat-adhesive layer transfer part of said thermal transfer sheet used in step (3); and (6) transferring said another transfer part having said heat adhesive layer formed thereon in step (5) onto said transfer part transferred onto the object in step (4) through the heat adhesive layer so as to cover the transferred part having the thermally transferred image formed thereon in step (4) on the object with said another transfer part formed in step (5).