Kodak's standard high-speed film from 1940 to 1954, when Tri-X was introduced in smaller formats. Discontinued before 1960 in roll-film formats, but sheet film was available until 1992. Originally 100, later ASA 200 when safety factor was reduced in 1960. Relatively coarse grain. Very long, almost perfectly straight-line characteristic curve, great latitude made it ideal for variable developments, both longer and shorter, water-bath development, special compensating formulas. (XX)