上述这种特殊技巧的处理。最常见的是通过相纸号数的选择进行调整,比如2号的暖黑调纸可表现出柔和的影调,4号的冷黑调纸可以表现出反差很高的影调。除通过相纸号数的选择进行影调的调整外,有时也可以通过改变胶片显影时间或相纸用显影液的种类来调整照片的影调。就是说,只有综合考虑从胶片冲洗到照片放 The handling of this particular technique above. The most common is through the choice of paper number to be adjusted, such as No. 2 warm black tone paper can show a soft shadow, No. 4 cold black tone paper can show a very high contrast tone. In addition to adjusting the tone by selecting the number of photo paper, you can sometimes adjust the photo tone by changing the film development time or the type of developer for photo paper. That is to say, only from a comprehensive consideration of film processing to photo release