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The important kinds of fibrous cellulosic material, other than wood, used for making pulps are mentioned in the General Explanatory Note.
Pulps of fibres derived from recovered (waste and scrap) paper or paperboard are usually presented in the form of dried, baled sheets and consist of heterogenous blends of cellulosic fibres. They may be bleached or unbleached. These pulps are obtained by a series of mechanical or chemical cleaning, screening and de-inking processes. Depending on the input material and the extent of the processing, they may contain small quantities of residues such as ink, clay, starch, polymer coatings or glues.
Pulps of this heading other than those derived from recovered (waste and scrap) paper or paperboard may be obtained by a mechanical process, a chemical process or a combination of mechanical and chemical processes.
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