Migration imaging system

A migration imaging member comprising a substrate and an electrically insulating softenable layer on said substrate, said softenable layer comprising a substituted, unsymmetrical tertiary amine charge transport molecule and a fracturable layer of electrically photosensitive migration marking material located substantially at or near the surface of said softenable layer spaced from said substrate, said charge transport molecule being predominantly nonabsorbing in the spectral region at which said electrically photosensitive migration marking material photogenerates charge carriers, being capable of increasing charge injection from said electrically photosensitive migration marking material to said softenable layer and being dissolved or molecularly dispersed in said softenable layer.

A migration imaging member comprising a substrate, an electrically insulating, softenable layer on said substrate, and a protective overcoating comprising a film forming resin, said softenable layer comprising a charge transport molecule and a fracturable layer of electrically photosensitive migration marking material located substantially at or near the surface of said softenable layer spaced from said substrate, said charge transport molecule being predominantly nonabsorbing in the spectral region at which said electrically photosensitive migration marking material photogenerates charge carriers, being capable of increasing charge injection from said electrically photosensitive migration marking material to said softenable layer and being dissolved or molecularly dispersed in said softenable layer.

An imaging method comprising providing a migration imaging member comprising a substrate, and an electrically insulating softenable layer on said substrate, said softenable layer comprising a charge transport molecule and a fracturable layer of electrically photosensitive migration marking material located substantially at or near the surface of said softenable layer spaced from said substrate, said charge transport molecule being predominantly nonabsorbing in the spectral region at which said electrically photosensitive migration marking material photogenerates charge carriers, being capable of increasing charge injection from said electrically photosensitive migration marking material to said softenable layer and being dissolved or molecularly dispersed in said softenable layer, electrostatically charging said member to deposit a uniform charge on said member, exposing said member to activating radiation in an imagewise pattern prior to substantial decay of said uniform charge and developing said member by decreasing the resistance to migration of marking material in depth in said softenable layer at least sufficient to allow migration of marking material whereby marking material migrates toward said substrate in image configuration.