acetate base การใช้

It was replaced by safety film with an acetate base.
In 1950, nitrate film was gradually replaced with what is commonly called safety film, which uses a less-volatile acetate base.
Faced with spy film that repeatedly tore and broke in space, Kodak invented a new type that replaced the acetate base with a polyester one.
From the late 1930s to the 1980s, microfilms were usually printed on a cellulose acetate base, which is prone to tears, vinegar syndrome, and redox blemishes.
Kodak eventually shifted its film from acetate base to Estar ( Kodak's name for a Mylar-equivalent plastic ), which enhanced the strength and allowed it to be pulled faster.