I recently bought 5 rectangular trays of slides from a thrift store. Its mostly Kodachrome but mixed with maybe a 1/3 of Ektarchrome. All Processed by Kodak between 1954 to 1957. My Observations: - Ektachrome, All faded to Magenta, most I can fix with color restoration during scan. - Kodachrome, Looks as good as it was developed yesterday. Sadly Mama didn't take kodachrome away, but kodak did.