Farmer's reducer

Far·​mer's reducer | \ˈfärmərz-, ˈfȧməz-\

Definition of Farmer's reducer 

: 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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History and Etymology for Farmer's reducer

after E. Howard Farmer †1944 English photographic technician who originated it

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the figure or shape of a crescent moon

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