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单词 farmer's reducer
释义 far·mer's reducer
\ˈfärmərz-, ˈfȧməz-\ noun
Usage: usually capitalized F
Etymology: after E. Howard Farmer died 1944 English photographic technician who originated it
: a 20 to 25 percent solution of hypo to which a few drops of a 10 percent solution of potassium ferricyanide are added and which is used for reducing the image density and fog density of photographic negatives and prints
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更新时间:2024/9/22 15:31:30