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制作一张好的彩色照片,关键是底片的质量。底片应是感光正确、密度适中、灰雾度小、颜色平衡。但由于彩色感光材料生产较复杂,质量并不绝对稳定,加之拍照和冲洗条件以及彩色相纸本身的偏色、放大光源的色温、加工工艺条件等因素的影响,都会引起彩色照片的偏色。所谓校正照片偏色,就是
Produce a good color photos, the key is the quality of the film. Negative film should be sensitive, medium density, low fog, color balance. However, the production of color photographic materials is complicated and the quality is not absolutely stable. In addition, the conditions of taking pictures and washing conditions, the color cast of color photographic paper itself, the color temperature of the amplified light source and the processing technology conditions all cause the color cast of color photographs. The so-called correction color cast, that is