4804.21.00.00 - Unbleached

This HTS classification, 4804.21.00.00, specifically covers unbleached sack kraft paper. Sack kraft paper is a type of paperboard designed for the production of paper bags and sacks, characterized by its high strength, particularly in tear resistance and bursting strength. It is manufactured from virgin wood pulp, typically bleached or unbleached chemical pulp, and is distinguished by its natural brown color in its unbleached state, indicating minimal or no chemical processing to remove lignin. This paper is always supplied in rolls or sheets, as per the broader heading.

This category is differentiated from its sibling, 4804.29.00.00, which covers "Other" sack kraft paper. The "Unbleached" designation in 4804.21.00.00 signifies that the paper has not undergone bleaching processes to remove color or alter its properties beyond the initial pulping and papermaking stages. Consequently, the primary distinction lies in the degree of processing and the resulting color and opacity of the paper.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification decisions at this level will therefore rely on confirming the material (kraft paper), its intended use (for sacks and bags), and its state of processing (unbleached), ensuring it is not covered by other, more specific headings within Chapter 48.