3701.91Subheading
Photographic plates and film; for colour photography (polychrome), in the flat, sensitised, unexposed, with no side exceeding 255mm, of any material other than paper, paperboard or textiles
Section VI — Products of the chemical or allied industries
This is a 6-digit subheading — the most specific level of the international HS. Country tariff schedules extend it further; the US tariff lines (HTS) below refine it to 8–10 digits for duty purposes.
US tariff lines for this subheading are not in the bundled starter dataset yet — the full HTS schedule is coming soon. You can still search by code in the tariff simulator.