| 摘要 |
PURPOSE:To improve image density, contrast, and fading resistance by using an Al salt and/or Cr salt high in chelating ability as a chelating agent. CONSTITUTION:A photosensitive layer contg. a 2,3-dihydroxynaphthalene derivative as a coupling agent and an Al salt or Cr salt as a chelating agent is formed on a support. An image copied on a photosensitive paper having a photosensitive layer is enhanced in any of image density, contrast, and fading resistance, by using AlCl3 or the like high in chelating ability as a chelating agent. |
