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Cellulose nitrate (c. 1889 – c. 1950) is the first of film supports.It can be found as roll film, motion picture film, and sheet film. It is difficult to determine the dates when all nitrate film was discontinued, however, Eastman Kodak last manufactured nitrate film in 1951. [1]
Despite the dangers of the nitrate film base being known practically since its development, it was used in virtually all major motion pictures prior to 1952, when Kodak completed a four-year conversion program to the sole manufacturing of acetate base film stocks. Kodak began working with acetate "safety film" as early as 1909, and started ...
Nitrocellulose film base manufactured by Kodak can be identified by the presence of the word "nitrate" in dark letters along one edge; the word only in clear letters on a dark background indicates derivation from a nitrate base original negative or projection print, but the film in hand itself may be a later print or copy negative, made on ...
All amateur film stocks were safety film, but the use of nitrate persisted for professional releases. Kodak discontinued the manufacture of nitrate base in 1951, and the industry transitioned entirely to safety film in 1951 in the United States and by 1955 internationally.
Film has been made on a variety of materials, including nitrate-based film stock (see: Nitrocellulose) and acetate-based film stocks, and polyester-backed film. [8] Due to that difference, each of these film types have a different conservation strategy. [8] Nitrate film must be handled carefully, as it is highly flammable. [8]
Fine Grain Release Positive, Type 825 B and A, B&W (discontinued) TV Recording Film, Type 834 B and A, B&W (discontinued) The 1969 list is identical to 1966. [8] 1969 is the last appearance of DuPont motion picture film stocks in the American Cinematographer Manual. The list below is from 1970; "A" was 16mm, "B" was 35mm. [9]
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Safety film" was relegated to sub-35 mm formats such as 16 mm and 8 mm until improvements were made in the late 1940s. Nitrate film is also chemically unstable and over time can decay into a sticky mass or a powder akin to gunpowder. This process can be very unpredictable; some nitrate film from the 1890s is still in good condition, while some ...