This material is treated with a mixture of sodium thiosulfate, called "hypo" in industry, and ferrous EDTA, which combine to form a mixture sometimes called "blix.
The sensitivity of this material can be measured using a logarithmic scale named for Julius Scheiner. One commercial brand of this material is subjected to the K-14 industrial process, which begins with an alkaline bath that removes antihalation backing. This material is treated with a mixture of sodium thiosulfate, called "hypo" in industry, and ferrous EDTA, which combine to form a mixture sometimes called "blix." This material, which is coated on one side with a gelatin emulsion, is subjected to a chemical process pioneered by John Herschel that consists of two major steps called (*) "bleaching" and "fixing." Cellulose acetate was an early compound used to make this material, which takes the form of thin sheets coated in the light-sensitive crystals of a silver halide. For 10 points, name this material, such as Kodachrome, which is "developed" to produce photographs.
The sensitivity of this material can be measured using a logarithmic scale named for Julius Scheiner.
photographic film