4707.10.00.00 - Unbleached kraft paper or paperboard or corrugated paper or paperboard

This HTS category, 4707.10.00.00, specifically covers unbleached kraft paper or paperboard, and unbleached corrugated paper or paperboard. The defining characteristic here is the "unbleached" nature, indicating that the cellulosic fibers have not undergone significant bleaching processes to remove lignin and impart a white color. Kraft paper, known for its strength, is produced using the sulfate process, and this classification extends to both the flat paper or paperboard form and the corrugated variety used for packaging.

It is crucial to distinguish this category from its siblings. HTS code 4707.20.00 pertains to paper or paperboard made primarily from bleached chemical pulp, which is notably whiter than the unbleached material. Similarly, 4707.30.00 encompasses paper or paperboard manufactured mainly from mechanical pulp, often recognized by its lower tear strength and tendency to yellow over time, such as newsprint. Finally, 4707.90.00.00 serves as a residual category for other recovered paper and paperboard, including unsorted waste and scrap that does not fit the more specific descriptions.

As a leaf node, 4707.10.00.00 does not have further subdivisions. Therefore, classification within this code relies on the precise identification of the material as unbleached kraft paper or paperboard, or its corrugated form, derived from recovered (waste and scrap) sources. The primary classification drivers are the unbleached state and the kraft manufacturing process, differentiating it from other grades of recovered paper and paperboard based on pulp type and processing treatments.