when Kodak was forced to separate Kodachrome film sales and processing in the USA in 1954, and the original Kodachrome patents had expired, Kodak disclosed the processing scheme and reagents, and independent laboratories took over Kodachrome processing.
clone, initially for the Kodachrome K11 process, later, as Kodachrome
II and X were introduced with K12 processing, Dynachrome issued its own
successor process named SK91 and a 25 ASA film, which was sold in
Germany as Turachrome-2, Kranz Color C16, and as the mail-order films
offered by department stores as Neckermann Brilliant, Reporter Color,
Unichrome, as well as Gratispool (GB), Tower Color, Mirachrome,
Canachrome etc. (US), as described by the German photo historian Gert
Koshofer in his book about color photography (1981). In a permanence
test published in 1994 by the same author, Kranz Color and Ilfachrome
(another Kodachrome clone from Ilford) slides from 1961 had virtually
Dynachrome 64 was manufactured by Ferrania with Agfacolor technology.
In 1970, Dynacolor stopped production of Kodachrome-clone film.