Farmer's reducer

短语

词形变化

Farmer's reducers 复数

释义与例句

n.
  1. 1.

    A mixture of sodium thiosulfate with the bleaching agent potassium ferricyanide, used to reduce the density of a negative or gelatin silver print.

    可数 不可数 艺术

词源

Named after Howard Farmer.

来源：wiktionary