Kodak Film Stock
If you ever wondered how to date film stock, if it's Kodak made you can tell by the code marks exposed on the edge of most motion picture films made since 1916. The date codes repeat every twenty years.
Remember that the date code refers to when the film was slit and perforated. In amateur use a year or two may have elapsed between manufacturing, distribution, photography and processing....also, some film is aged to stabilize its characteristics before offered for sale.
Further points of identification: 16mm has been manufactured only since 1923, regular 8 film since 1932, super 8 made its appearance in 1965. As to film types, black and white reversal was introduced in 1923. Kodachrome in 1935, Kodachrome Commercial in 1947, and Kodachrome II in 1961. Kodachrome Commercial 5268 was replaced by Ektachrome Commercial 7255 in 1958, which in turn was superceded by Ektachrome Commercial 7252 in 1970.
Following is a chart of edge identification for some commonly used film types, and the translation:
- EKTACHROME C SAFETY FILM: Ektachrome Commercial 7255
- EASTMAN ECO SAFETY FILM: Ektachrome Commercial 7252
- EKTACHROME SAFTEY FILM: Ektachrome ER 7257
- EKTACHROME B SAFETY FILM: Ektachrome ERB 7258
- KODAK SAFETY FILM (color stock) Ektachrome MS 7256
- KODACHROME SAFETY FILM: Kodachrome Daylight, or Kodachrome Duplicating Film
- (with edge numbers): usually Kodachrome Commercial 5268
- KODACHROME A SAFETY FILM: Kodachrome Type A
- KODACHROME II SAFETY FILM: Kodachrome II
- KODACHROME II A SAFETY FILM: Kodachrome II Type A
- EKTACHROME EF SAFETY FILM: Ektachrome EF 7241
- EKTACHROME EFB SAFETY FILM: Ektachrome EFB 7242
- EASTMAN REV SAFETY FILM: "Kodachrome" print stock 5269
- EASTMAN REV II SAFETY FILM: "Kodachrome" print stock 7387
- KODAK N SAFETY FILM: Black & white negative
- KODAK R SAFETY FILM: Black & white reversal
- KODAK SAFETY POSITIVE: Black & white release positive stock
- EASTMAN SAFETY FILM: Might be anything of recent manufacture including
- EFB 7242, 7387, 7389, 7390. Must be identified by examination.
- EKTACHROME REV PRINT SAFETY FILM: Ektachrome print stock 7386
- EKTACHROME R PRINT SAFETY FILM: Ektachrome print stock 7388