tripack

For a brief period in the early 1930s, the American Agfa-Ansco company produced Colorol, a roll-film tripack for snapshot cameras.

Like Kodachrome, introduced by Eastman Kodak in 1935, the new Agfacolor film was an "integral tripack" with three differently color-sensitized emulsion layers.

In 1935, American Kodak introduced the first modern "integral tripack" color film and called it Kodachrome, a name recycled from an earlier and completely different two-color process.

If the three layers of emulsion in a tripack did not have to be taken apart in order to produce the cyan, magenta and yellow dye images from them, they could be coated directly on top of each other, eliminating the most serious problems.