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===Acetate=== | ===Acetate=== | ||
[[File:Acetate_note.jpg|300px|thumb|righ|A handling note found on a 35mm acetate print from Universal]] | [[File:Acetate_note.jpg|300px|thumb|righ|A handling note found on a 35mm acetate print from Universal]] | ||
Used in the early 1930s mostly for small gauges, then was widely used post 1950s to replace nitrate base. Often refered to as "safety 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 (whatever THOSE are!). Older acetate prints tend to be more brittle and prone to warping as they lose moisture. Acetate is thicker and tends to break when stressed. | Used in the early 1930s mostly for small gauges, then was widely used post 1950s to replace nitrate base. Often refered to as "safety 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 (whatever THOSE are!). Older acetate prints tend to be more brittle and prone to warping as they lose moisture. Acetate is thicker and tends to break when stressed. | ||
*Introduced in 1948 as a replacement for nitrate film for 35mm prints | |||
*Use only tape or cement splices | *Use only tape or cement splices | ||
*Acetate base prints can suffer from vinegar syndrome if not stored at the proper temperature and humidity levels. Make sure they are kept cool and dry, and separate out any prints you suspect of having vinegar syndrome (even the beginning stages) as it can spread from one print to another. | *Acetate base prints can suffer from vinegar syndrome if not stored at the proper temperature and humidity levels. Make sure they are kept cool and dry, and separate out any prints you suspect of having vinegar syndrome (even the beginning stages) as it can spread from one print to another. | ||