化学灰雾：显影过度造成全面性增加的密度。是由于未曝光的卤化银被显影液感染所引致。
Chemical fog: Overall density produced by an excessive degree of development, due to unexposed silver halides being attacked by the developing solution.
它将产生高密度变化范围，同时显影过程允许进行会造成相关联的低灰雾的迫冲。
It yields a long density range, and its development latitude allows push processing with relatively low fog.
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