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灰雾密度对感光材料来说是难以避免的。但是,当灰雾值超出允许范围时,就会使感光材料的密度、反差、感光度、宽容度等照相性能产生偏差,影响正确还原,降低影象质量。所以,通常在显影液中加入KBr或KI等无机防灰雾剂来抑制灰雾。随着影象科学的迅速发展,无机防灰雾剂已不能满足彩色影象洗印加工质量的要求,特别是高温快速彩色底片(即Ⅱ型彩底)和彩色中间片(即Ⅱ型彩中)的显影
Fog density is unavoidable with light-sensitive materials. However, when the fogging value is out of the allowable range, the density, contrast, sensitivity, latitude and other photographic properties of the photosensitive material will be deviated, affecting the correct reduction and reducing the image quality. Therefore, fogging is usually suppressed by adding an inorganic anti-fogging agent such as KBr or KI to the developer. With the rapid development of imaging science, inorganic antifoggants have been unable to meet the requirements of color image processing quality, especially high temperature rapid color negative film (ie, Ⅱ type color base) and color intermediate film (ie, type Ⅱ color) Development