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本文研究了铜物理显影后影像中铜和银的分布以及在非影像区明胶对Ａｕ￣（３＋）的还原作用。铜含量随着影像深度的增加而增加，银含量却随着深度的增加而减少。Ａｇ３ｄ结合能向低值位移说明影像内部的银处于单原子和多原子的混合状态，但是影像表面的银却为单原子状态，如果铜物理显影进行得足够长，铜最终会将银全部遮盖。在这以后的铜物理显影是铜的自催化过程，样片浸入氯金酸溶液中后，非影像区中吸收的氯金酸量大大高于影像区，因而铜的沉积速度在非影像区也比影像区大得多．明胶能还原Ａｕ￣（３＋）。还原过程可分为两步：第一步由Ａｕ￣（３＋）还原成Ａｕ￣＋，这一步在室温下是快反应；第二步由Ａｕ￣＋还原成金，这个反应比较慢，Ａｕ￣＋和Ａｕ在物理显影中可作为催化核，使铜在非影像区沉积。
In this paper, the distribution of copper and silver in the image after copper physical development and the reduction effect of gelatin on Au ~ (3 +) in non-image area were studied. The copper content increases with the depth of the image, while the silver content decreases with depth. The shift of Ag3d binding energy to a low value indicates that the silver in the image is in a mixture of monoatomic and polyatomic phases, but the silver in the image surface is in a monatomic state. If the physical development of copper is sufficiently long, the copper eventually covers the silver completely. After this copper physical development is the copper autocatalytic process, the sample immersed in the chloroauric acid solution, the non-imaging area of the chloroauric acid absorption is much higher than the image area, so the deposition rate of copper in non-image area than Image area much larger. Gelatin can restore Au ~ (3 +). The reduction process can be divided into two steps: the first step is Au ~ (3+) reduction Au ~ +, this step is fast reaction at room temperature; the second step from Au ~ + reduced to gold, the reaction is relatively slow, Au ~ And Au can be used as catalytic nuclei in physical development to deposit copper in non-image areas.