5407.41.00.10 - With both selvages woven (621)

This HTS classification covers woven fabrics manufactured from synthetic filament yarns, specifically those with a weight of 85% or more consisting of nylon or other polyamide filaments. The fabrics falling under this code are either unbleached or have undergone a bleaching process. A key characteristic of these fabrics is their suitability for the production of typewriter and machine ribbons. This designation is based on precise yarn specifications, including an average decitex exceeding 28 but not 83, and specific thread counts per centimeter in both warp and filling directions, with the warp thread count not exceeding 60% of the total thread count.

This category is distinct from its sibling, 5407.41.00.20, which is designated for "Other" woven fabrics of nylon or polyamide that do not meet the specific criteria for typewriter and machine ribbon material. The crucial difference lies in the physical and performance characteristics dictated by yarn decitex and thread count, which are tailored for the specific application of ribbon manufacturing.

As a leaf node, this classification represents the most granular level for this particular type of fabric. Therefore, there are no further subcategories to introduce. Classification into this specific code relies on a meticulous assessment of the fabric's construction, material composition, and the precise measurements of yarn decitex and thread density to ensure it meets the stringent requirements for typewriter and machine ribbon production.