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.
• As the film was rotated on a disc instead of over a acetate base, comparable thickness with 4? " sheet film, which holds the film much flatter than the other formats of the time.
• Steve Leggett, staff coordinator of the National Film Preservation Board, said film has to be kept at temperatures near freezing and as dry as possible to prevent the acetate base from dissolving into acetic acid, the main acid of vinegar.
• As part of its future plans, the group will expand the production capacity of sealants in the third quarter of 1998, manufacture of polyvinyl acetate based adhesive in the fourth quarter of 1998 and manufacture of high-quality collapsible aluminium tubes for marker pens in the fourth quarter of 1998.
• However, the film loaded in a Single-8 cartridge has exactly the same dimensions as Super 8 ( though it is made of a thinner & stronger polyester base, rather than the acetate base of Super 8 film ), and can be viewed in any Super 8 projector after processing.
• Microfilm with a cellulose acetate base ( popular through the 1970s ) is frequently subject to vinegar syndrome, redox blemishes, and tears, and even preservation standard silver halide film on a polyester base can be subject to silvering and degradation of the emulsion all issues which affect the quality of the scanned image.