在照像过程中,由于卤化银粒子的光散射,而致使胶片清晰度下降。当在乳剂加入阻光染料(不同于增感染料)后可改善这种情况。但在有些情况下,这些阻光染料会使胶片增加灰雾和使乳剂减感。本文叙及的含有碱金属磺甲氨基的蒽醌型阻光染料,能有效地消除由于卤化银粒子的光散射而产生的有害作用,而对乳剂照像性能影响较小。 During photographic processing, the clarity of the film is reduced due to the light scattering of the silver halide grains. This can be improved when the opacifying dye (unlike the sensitizing dye) is added to the emulsion. However, in some cases, these light-blocking dyes can increase fogging and de-feel the emulsion. The anthraquinone-based block dyes containing alkali metal sulfomethylamino as mentioned herein can effectively eliminate the harmful effects caused by the light scattering of the silver halide grains and have little effect on the photographic performance of the emulsion.