Chemical fog: Overall density produced by an excessive degree of development, due to unexposed silver halides being attacked by the developing solution.

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。

youdao

As to the color of metal fog, the electrochemical dissolution reaction indicates blue-purple but the chemical dissolution indicates brown.

当发生电化学溶解反应时，金属雾呈紫蓝色；而当化学溶解时，金属雾呈棕色。

youdao

It was found apparently from the metal fog that the applied cathodic polarization current can inhibit the electrochemical dissolution of aluminium but is not so effective on the chemical dissolution.

从金属雾的外观可以判断：外加的阴极极化电流能够抑制金属的电化学溶解，但是化学溶解作用继续发生。

youdao

He does use foams and the like, though you are not likely to be served anything emanating chemical fog here.

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