感光胶片只有经正确曝光、正常冲洗才能得到良好的底片。相反,若曝光不正确,既使正常冲洗,也不能得到良好的底片。什么是经正确曝光的底片呢?经正确曝光的黑白底片,正常冲洗加工后,不仅能在底片上清晰的表现出被摄物强光部分、中间部分和阴暗部分的影纹,而且还能在这三部分中再分出几个层次。经正确曝光的彩色底片,正常冲洗加工后,除应具有清晰的影纹及层次外,还应具有良好的彩色再现。 Photographic film only by the correct exposure, the normal flush to get a good film. On the contrary, if the exposure is not correct, even if the normal washing, it can not get a good film. What is the correct exposure of the film it? The correct exposure of the black and white film, the normal processing, not only in the film clearly show the bright part of the subject, the middle part and dark part of the shadow pattern, but also in There are several subdivisions in these three sections. The correct exposure of the color film, the normal processing, in addition to should have a clear shadow and level, but also should have a good color reproduction.