A film base is a transparent substrate which acts as a support medium for the photosensitive emulsion that lies atop it. Despite the numerous layers and coatings associated with the emulsion layer, the base generally accounts for the vast majority of the thickness of any given film stock. Historically there have been three major types of film base in use: nitrocellulose (cellulose nitrate), cellulose acetate, (cellulose triacetate, cellulose diacetate, cellulose acetate propionate, and cellulose acetate butyrate), and polyester (polyethylene terephthalate (PET) (Kodak trade-name: ESTAR)).
Read more about Film Base: Nitrate, Acetate, Polyester, Identifying A Film Base
Famous quotes containing the words film and/or base:
“Lay not that flattering unction to your soul,
That not your trespass but my madness speaks;
It will but skin and film the ulcerous place,
Whilst rank corruption, mining all within,
Infects unseen.”
—William Shakespeare (1564–1616)
“It is a base thing for a man among the people not to obey those in command. Never in a state can the laws be well administered when fear does not stand firm.”
—Sophocles (497–406/5 B.C.)