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Film base: Difference between revisions
→Acetate
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===Acetate=== | ===Acetate=== | ||
[[File:Acetate_note.jpg|300px|thumb| | [[File:Acetate_note.jpg|300px|thumb|right|A handling note found on a 35mm acetate print from Universal]] | ||
[[File:Safety film.jpg|300px|thumb|right|Edge markings indicating that this film base is acetate]] | |||
Used in the early 1930s mostly for small gauges, acetate film was first used for 35mm print in 1948 in order to replace nitrate prints, and became widely used by the mid-1950s. Often referred to as "safety film" in order to differentiate it from the highly unstable nitrate film. Acetate base in modern exhibition settings usually refers to '''triacetate''' base. '''Diacetate''' was used on some early safety film, but you won't see it very often under normal circumstances. Older acetate prints tend to be more brittle and prone to warping as they lose moisture. Acetate is thicker than polyester (see below) and tends to break or snap when stressed. | Used in the early 1930s mostly for small gauges, acetate film was first used for 35mm print in 1948 in order to replace nitrate prints, and became widely used by the mid-1950s. Often referred to as "safety film" in order to differentiate it from the highly unstable nitrate film. Acetate base in modern exhibition settings usually refers to '''triacetate''' base. '''Diacetate''' was used on some early safety film, but you won't see it very often under normal circumstances. Older acetate prints tend to be more brittle and prone to warping as they lose moisture. Acetate is thicker than polyester (see below) and tends to break or snap when stressed. | ||
*Use only tape or cement splices, it cannot be spliced ultrasonically | *Use only tape or cement splices, it cannot be spliced ultrasonically | ||