To remove gelatin from something or treat something to remove its gelatin coating or content.
From de- (remove) + gelatin + -ize (suffix meaning 'to make or treat with'). This specialized term is used in photography, film, and chemical processing.
Old photographic film had a gelatin layer that protected the light-sensitive chemicals, but when restoring ancient photographs, scientists must degelatinize the film to reach and clean the actual image underneath.
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