Commercial rayon was produced in 1884 from the textile fibre but was short lived because of flammability. CN lacquers for the automobile industry were developed in 1920s. CN is prepared by converting alcohol groups of cellulose into nitrate esters. This requires the presence of nitric acid and sulfuric acid for hydration and to suppress ionization of the nitric acid. Post-mould shrinkage is negligible.
All cellulosics are suitable for normal cutting and machining operations.
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