5205.12.10.00 - Unbleached, not mercerized (300)

This HTS classification, 5205.12.10.00, pertains to single cotton yarns that are uncombed and fall within a specific fineness range. Specifically, these yarns must contain 85 percent or more by weight of cotton, not be put up for retail sale, and have a yarn count exceeding 14 tex but not exceeding 43 tex (equivalent to exceeding 43.5 nm but not exceeding 14.1 nm in count, though the description clarifies the nm range). The "unbleached, not mercerized" descriptor further refines the physical treatment of the cotton fibers before spinning. These characteristics make the yarn suitable for various industrial textile applications where a natural, untreated cotton thread is required.

Within the broader category of single cotton yarns of uncombed fibers exceeding 14 nm but not exceeding 43 nm, this specific code distinguishes itself from its sibling category, 5205.12.20.00 ("Other"). The distinction lies in the treatment of the yarn. While this subcategory specifically identifies yarns that are *unbleached and not mercerized*, the sibling category 5205.12.20.00 would encompass other single yarns within the same fineness and fiber composition that have undergone different treatments or lack these specific negative attributes. For instance, mercerized yarns or yarns that are bleached would fall under the "Other" designation.

As this classification is a leaf node, there are no further subcategories. Therefore, the focus for classification under 5205.12.10.00 is on confirming that the single cotton yarn meets the criteria for being unbleached, not mercerized, and falls within the specified yarn count range of exceeding 14 nm but not exceeding 43 nm, while also containing 85 percent or more cotton by weight and not being packaged for retail sale. Examples of such yarns might include those intended for weaving into specific types of industrial fabrics, such as canvas or certain types of sheeting, where the unbleached and unmecercerized properties are crucial for the final product's characteristics.