彩色正片用量较大,降低其含银量不但很有经济价值,而且对提高胶片质量也有很大的意义。例如一般含银量在5～6克/平方米的彩色正片,目前,通过调整配方,含银量可降到4克/平方米左右。如果黄层改用二当量成色剂,彩正含银量还可大幅度降低。银量降低后胶片的清晰度也能得到提高。按彩色片成色原理,四当量成色剂生成一克分子染料,需要四克分子的卤化银;二 Large amount of color positive film, reducing the silver content is not only of great economic value, but also to improve the quality of the film is also of great significance. For example, the general amount of silver in the 5 ~ 6 g / m2 color positive film, at present, by adjusting the formula, the amount of silver can be reduced to 4 g / square meters. If the yellow layer to use two equivalent coupler, color is silver content can be significantly reduced. Reduced silver film clarity can also be improved. According to the principle of color film color, four-equivalent coupler to generate one gram of molecular dye, you need four grams of molecular silver halide; two