Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 5, 2006
0Patent Application Number
104853830
Date Filed
January 15, 2004
0Patent Primary Examiner
Patent abstract
There is provided a method of removing acids from the surface and interior of an acetate film produced by deterioration during storage. Such methods are characterized by extracting and removing the acids from the surface and interior of the acetate film, and the extraction treatment includes solvent extraction or evacuation (heating). This method suppresses the deterioration process in the storage of the acetate film.
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