?法梅氏减落薄业

...Farmer's reducer: A solution for reducing the density of developed negatives, invented by Howard Farmer and containing principally potassium ferricyanide and sodium thiosulfate.法梅氏减落薄业:侯活法梅发明的减薄液，它是一种能把显影底片的密度减弱的液体。主要成分是铁青化钾(山埃)和硫代硫酸钠(大苏打)。