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  2. Cellulose acetate film - Wikipedia

    en.wikipedia.org/wiki/Cellulose_acetate_film

    Cellulose diacetate film was first created by the German chemists Arthur Eichengrün and Theodore Becker, who patented it under the name Cellit, from a process they devised in 1901 for the direct acetylation of cellulose at a low temperature to prevent its degradation, which permitted the degree of acetylation to be controlled, thereby avoiding total conversion to its triacetate.

  3. Cellulose acetate - Wikipedia

    en.wikipedia.org/wiki/Cellulose_acetate

    Cellulose acetate film, made from cellulose diacetate and later cellulose triacetate, was introduced in 1934 as a replacement for the cellulose nitrate film stock that had previously been standard. When exposed to heat or moisture, acids in the film base begin to deteriorate to an unusable state, releasing acetic acid with a characteristic ...

  4. Conservation and restoration of film - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Cellulose acetate is also known as "safety" film and started to replace nitrate film in still photography in the 1920s. [1] There are several types of acetate that were produced after 1925, which include diacetate (c. 1923 – c. 1955), acetate propionate (1927 – c. 1949), acetate butyrate (1936–present), and triacetate (c. 1950 – present). [1]

  5. Vinegar Syndrome - Wikipedia

    en.wikipedia.org/wiki/Vinegar_Syndrome

    Vinegar Syndrome, named for the acidic smell of deteriorating film, was founded in 2012 by Joe Rubin and Ryan Emerson. [10] [11] The company was founded to restore and distribute X-rated films from the 1960s to the 1980s, including pornographic films released during the Golden Age of Porn, on home media. [10]

  6. Recycling codes - Wikipedia

    en.wikipedia.org/wiki/Recycling_codes

    Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

  7. Film stock - Wikipedia

    en.wikipedia.org/wiki/Film_stock

    In 1909, tests showed cellulose diacetate to be a viable replacement base, and Kodak began selling acetate-base films the following year in 22 mm widths for Edison's work on the Home Kinetoscope, which was commercially released in 1912. Eastman Kodak introduced a non-flammable 35 mm film stock in 1909.

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