And why post this on the Archivists list? Kodachrome was famous and distinctive among color films in setting a standard for colorfastness and permanence. Ektachrome and other varieties were cheap and easy, but within a few years they would be substantially washed out. But a Kodachrome slide, kept in the dark in an archival sleeve, would be as bright as the day it was processed, even after 50 years.
Ye Archivists: gather up the world's remaining Kodachromes and care for them well. They will determine how much of the 20th century will look for all time to come.