| 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 |