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cellulose film

Cellophane, transparent, nonpenetrable film of cellulose used in packaging, first developed by J. E. Brandenburger (1911). Wood pulp is soaked in sodium hydroxide, shredded, aged, and mixed with carbon sulfide to form a solution of viscose. After an acid bath, the cellulose is regenerated as a film, dried and waterproofed.

See also: Cellulose.

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