Photographic film called safety film is made with an acetate base, chemically either cellulose diacetate, cellulose acetate propiarate, cellulose acetate butyrate, or cellulose triacetate. Beginning in the 1920s, it replaced nitrocellulose, or nitrate, film bases used previously as the film stock used in both amateur and professional applications.
Cellulose triacetate films are still in use today for some applications, but have largely been replaced with polyester bases that are more stable and more durable.
Photographic film called safetyfilm is made with a film base of either acetate or polyester.
Beginning in the 1920s, acetate replaced nitrocellulose (nitrate) film bases used previously as the film stock used in both amateur and professional applications.
Cellulose triacetate films are still in wide use today for applications such as original camera negatives, but have largely been replaced with polyester, which is more stable and durable for archival and post-production purposes.
Film stock is the term for photographic film on which motion pictures are shot.
Negative films require additional transferring; since negative films are much more commonly used, terms are based on the steps needed to produce a viewable finished print: one speaks of negatives and positives.
Film is also classified according to its gauge and the arrangement of its perforations— gauges range from 8 mm to 70 mm or more, while perforations may vary in shape, pitch, and positioning.
Feeds |
Contact