1. An imaging method comprising: (A) providing an imaging member comprising a migration layer comprising migration material and substantially electrically insulating softenable material, said softenable material capable of having its resistance to migration of migration material decreased sufficiently to allow migration of migration material in depth in said softenable material; (B) providing said imaging member with a negative charge electrical latent image; and (C) setting said negative electrical latent image by storing said imaging member in the dark for at least about 200 minutes.