| 摘要 |
PURPOSE:To obtain an image having a high density and less tendency for generating fog, and to improve film quality and film thickness and shelf-life of the image by jointly using two kinds of compds. capable of increasing pH by reacting the compd. with each other, and a specific hardener in the image forming reaction system. CONSTITUTION:The compds. capable of increasing pH by reacting the compd. with each other, and the hardener shown by formula I or II are jointly used in the image forming reaction system. The image forming reaction system means a range of generating the image forming reaction, and concretely, comprises layers belonging to both elements of a photosensitive element and a fixing element of the coloring matter. When the two or more said layers present, any one of the layers is used. As the layer usable for the hardener has <=20mu, preferably 0.1-10mu film thickness, the image forming layer has advantages about film property, light scattering property and transferring property of the coloring matter. The used amount of the hardener is 0.05-20wt%, preferably, 0.1-10wt% on the basis of the total amount of the binder capable of crosslinking by reacting with the hardener. |
