4810.32 - Bleached uniformly throughout the mass and of which more than 95 percent by weight of the total fiber content consists of wood fibers obtained by a chemical process and weighing more than 150 g/m²:

This HTS classification, 4810.32, specifically covers kraft paper and paperboard that has been bleached uniformly throughout the mass, with a fiber content composed of over 95 percent wood fibers derived from a chemical process. Crucially, these papers and paperboards exceed a weight of 150 grams per square meter (g/m²). The defining characteristic distinguishing this category from its siblings is this weight threshold, indicating a heavier, more robust grade of paper or paperboard.

It is important to differentiate this category from 4810.31, which covers similar bleached kraft papers but weighs 150 g/m² or less. The "Other" category, 4810.39, would encompass kraft papers and paperboards that do not meet the specific bleaching or fiber content requirements of 4810.32.

Within this classification, further subdivision exists to refine the classification based on the dimensions of the product. The subcategory 4810.32.10 applies to products presented in strips or rolls with a width exceeding 15 cm, or in rectangular (including square) sheets where one side exceeds 36 cm and the other exceeds 15 cm when unfolded. An "Other" subcategory exists for products not meeting these specific dimensional criteria, ensuring comprehensive coverage within this weight and material specification.