4804 - Uncoated kraft paper and paperboard, in rolls or sheets, other than that of heading 4802 or 4803:
Sub-classifications
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4804 1100 00
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4804 1900 00
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4804 2100 00
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4804 2900 00
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4804 31
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4804 3110 00
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4804 3120 00
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4804 3140
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4804 3140 20
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4804 3140 40
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4804 3160 00
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4804 39
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4804 3920 00
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4804 3940
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4804 3940 20
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4804 3940 49
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4804 3960
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4804 3960 40
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4804 41
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4804 4120 00
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4804 4140 00
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4804 4200 20
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4804 4200 40
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4804 4200 50
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4804 4900 00
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4804 5100 00
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4804 5200 20
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4804 5200 40
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4804 5200 50
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4804 5900 00
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Overview
HTS 4804 encompasses uncoated kraft paper and paperboard, a category defined by its primary material composition and manufacturing process. This includes papers and paperboards produced from the chemical pulping of wood, specifically yielding a high proportion of lignin, which gives kraft products their characteristic strength. The "uncoated" designation signifies that these materials have not undergone surface treatments like coating or calendering to alter their finish or properties, distinguishing them from more specialized paper products. Products within this heading are typically used for packaging, industrial applications, and as components in various manufactured goods where robust material properties are essential.
This category is distinct from other broad paper and paperboard headings by its focus on uncoated kraft material. For instance, it excludes papers classified under HTS 4802, which are typically printing and writing papers, often coated or treated for specific aesthetic or functional qualities, and HTS 4803, which covers toilet paper and similar paper intended for household or sanitary use. The defining characteristic for HTS 4804 is the inherent strength and natural brown or unbleached appearance derived from the kraft pulping process, without subsequent significant surface enhancements.
Within HTS 4804, further subdivisions are made based on the specific application and weight of the kraft paper and paperboard. "Kraftliner" refers to a type of kraft paperboard primarily used as the facing material in corrugated board. "Sack kraft paper" is specifically designed for the manufacture of paper bags and sacks, possessing high tensile strength and tear resistance. The remaining subcategories further differentiate based on the grammage (g/m²), a critical factor in determining the suitability of the material for various structural and protective functions, ranging from lighter weight papers to heavier, more rigid paperboards.