| 摘要 |
PURPOSE:To obtain high color development density even by low temperature development by forming a coating layer composed essentially of carboxyl- modified polyvinyl alcohol and an epoxy-modified polyamide resin on a photosensitive layer. CONSTITUTION:The coating layer composed essentially of carboxyl-modified polyvinyl alcohol and an epoxy-modified polyamide resin is formed on the photosensitive layer. At least one of a diazo compound and a coupling component is contained in microcapsules, and the shells of them are made of polyurea or polyurethane, and it is preferred to use said polyvinyl alcohol and said polyamide in a weight ratio of 10:(0.5-10), especially, 3-8, thus permitting high color development density to be obtained even by low temperature development. |
