Agfacolor Neu, also known as Agfacolor 111, went on public sale in November 1936 in 135 format as an ISO 3/6° film and was the first subtractive 3 layer color film incorporating dye couplers in each of the layers which could be processed at the same time by a single color developer. This arrangement formed the basis for all subsequent color slide and negative films. In comparison, Kodak Kodachrome which launched a year earlier required the processing of each color layer separately. Agfacolor Neu was initially made available on a trial basis from April 1936 with use in the August 1936 Berlin Olympics. By 1941 speed was increased to ISO 10/11° and later to ISO 25/15°.