4810.31.10.20 - Folding carton stock

This HTS classification, 4810.31.10.20, specifically covers "folding carton stock." This refers to kraft paper and paperboard that is bleached, predominantly composed of wood fibers derived from chemical pulping, and weighs 150 g/m² or less. Crucially, these materials are supplied in rolls wider than 15 cm or in rectangular sheets where both dimensions exceed 36 cm and 15 cm, respectively, in their unfolded state. The defining characteristic of this subcategory is its intended use as a substrate for folding cartons, such as those used for packaging consumer goods.

The distinction between this category and its sibling, 4810.31.10.40 ("Base stock for trays, dishes, plates, cups and the like"), lies in the intended application. While both are processed kraft paperboard, folding carton stock is specifically designed for the creation of boxes and containers that fold and assemble, whereas the sibling category is for materials used in forming rigid or semi-rigid items like trays and cups. The "Other" sibling category would encompass any remaining kraft paperboard within the broader classification that does not fit the specific uses defined by the other subcategories.

As this is a leaf node within the HTS, there are no further subdivisions under 4810.31.10.20. Therefore, classification within this specific code relies on confirming that the material meets all the preceding criteria – being coated with kaolin or other inorganic substances, being kraft paperboard, bleached, predominantly chemical wood pulp fiber content, weighing 150 g/m² or less, and being presented in the specified dimensions, with the primary intended use being for folding carton production.