摄影技术包括两个过程:第一个过程是用照相机将景物拍摄在感光片上;然后再通过显影使潜影变成可见的与实际景物相反的负像,最后再将负像印相(放大)在相纸上成为正像(照片),这是第二个过程,也就是暗室技术的操作过程。因此,暗室技术包括负片冲洗、印相和放大等几个部分。负片冲洗是暗室技术中的一项重要工作,它对于最后照片质量的好坏有着极大的关系。尽管照相时取景、曝光等做得很好, The photographic technique consists of two processes: the first is to capture the scene on a photographic film with a camera; then the latent image is made visible by the camera to the negative image opposite to the actual scene, and finally the negative image is printed (enlarged) This is the second process, which is the operation of darkroom technology. Therefore, the darkroom technology includes several parts such as negative film washing, printing and amplification. Negative film washing is an important work in darkroom technology, which has a great relationship to the quality of the final photo. Although the camera framing, exposure, etc. do a good job,