4802.58.60.20 - Containing by weight 25 percent or more cotton fiber

This HTS classification covers uncoated paper and paperboard, specifically those that are not produced using mechanical or chemi-mechanical pulping processes, or where such fibers constitute no more than 10 percent of the total fiber content. Furthermore, these papers and paperboards must weigh more than 150 grams per square meter. The key defining characteristic of this subcategory is that it contains 25 percent or more cotton fiber by weight. Examples include specialty papers for printing, stationery, or other graphic applications where the presence of a significant cotton content is a defining feature for its end-use or quality.

This specific classification is distinguished from its sibling category, 4802.58.60.40 (Other), by its explicit requirement for a cotton fiber content of 25 percent or more. While both fall under the broader category of "Other" paper and paperboard weighing over 150 g/m², the differentiating factor here is the precise quantitative measurement of cotton fiber. This detailed distinction is crucial for accurate tariff assessment, as the presence and proportion of cotton can influence customs duties.

As a leaf node, this classification has no further subcategories. Therefore, the focus for classification within this category is on adhering to all the preceding hierarchical criteria: being uncoated paper or paperboard for writing, printing, or graphic purposes, not containing excessive mechanical/chemi-mechanical fibers, weighing over 150 g/m², and crucially, containing 25 percent or more cotton fiber by weight.