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Cellophane
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==Production== Cellulose is produced from [[wood]], [[cotton]], [[hemp]], and other organic fibres, dissolved in [[alkali]] and [[carbon disulfide]] to make a solution of liquid [[viscose]]. The solution is then extruded through a slit into a bath of dilute [[sulfuric acid]] and [[sodium sulfate]] to reconvert the viscose into a cellulose film. The film is then passed through a further series of baths; one to remove [[sulfur]], one to bleach the film, and one to add softening materials, such as [[glycerin]], to prevent the film from becoming brittle. A similar process is used to make [[rayon | rayon fibre]], wherein the viscose solution is extruded through a [[Spinneret (polymers)|spinneret]], to form cellulose ''filaments'', rather than a slit, which forms cellulose ''film''. Cellophane - like (filamentous) viscose, rayon and cellulose - is a [[polymer]] of [[glucose]]; insofar as cellophane is structurally different to [[Monomer|monomeric]] glucose, while its chemical composition is the same.
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