Color reversal internegative
Color reversal internegative, or CRI, was a motion picture film duplication process designed by Kodak in the 1970s as a workaround for the existing interpositive/internegative process of creating film duplicates, or "dupes". Originally intended for the faster pace of the television commercial industry, it began to see use in major motion pictures of the mid 1970s.
A major problem was discovered only years later that the stock was prone to rapid fading, on an average of within five to seven years. As a result, new masters have had to be created to restore the original stock in order to keep classic films such as Superman (1978) and Jaws (1975) from fading away. Groups such as the Film Foundation and the National Film Preservation Board were established to address these issues as well as many other problems with decomposing nitrate film stock.