4810.29.10 - In strips or rolls of a width exceeding 15 cm or in rectangular (including square) sheets with one side exceeding 36 cm and the other side exceeding 15 cm in the unfolded state

This HTS category, 4810.29.10, pertains to specific types of coated paper and paperboard intended for graphic purposes, characterized by a significant mechanical or chemi-mechanical pulp content. The core criterion for inclusion is that over 10 percent of the fiber weight must originate from these mechanical processes. This distinguishes it from papers with a higher proportion of chemical pulp, which would fall under different headings. The paper or paperboard must be coated on one or both sides with kaolin or other inorganic substances, with no additional coatings applied.

The "Other" designation at this level indicates that this specific sub-classification does not have further subdivisions based on the inherent properties of the paper itself beyond its mechanical pulp content and coating. It serves as a broad category for these mechanically pulped, inorganic-coated graphic papers that do not fit into more narrowly defined sub-classifications within the 4810.29 series. The governing characteristic for classification here is the fiber composition and the inorganic coating.

Within this classification, the subsequent subcategories differentiate based on the physical form of the material. 4810.29.10.25 covers products presented in rolls, while 4810.29.10.35 applies to those presented in rectangular or square sheets meeting specific dimensional thresholds (one side exceeding 36 cm and the other exceeding 15 cm). This distinction is crucial for import and export procedures, impacting duty rates and documentation requirements.