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SITCSection 6
U.S. imports of uncoated paper & paperboard (over 10% mechanical fiber) in rolls or sheets (SITC 64129) totaled $56.0M in April 2026, traded with 22 countries.
Importers of Uncoated Paper & Paperboard (Over 10% Mechanical Fiber) in Rolls or Sheets paid $369K in duties in April 2026 — an effective duty rate of 11% on $3.5M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataPapers and paperboards in this heading are distinguished by a mechanical-fiber content exceeding 10% of total fiber weight — a composition that typically results in lower brightness, reduced permanence, and higher opacity compared with fully chemical-pulp grades, making them well-suited for newsprint-adjacent applications, directory paper, and certain packaging substrates. The mechanical-fiber threshold is the single most important classification variable separating this heading from the lower-mechanical-fiber printing-paper category, and it must be substantiated by mill documentation at entry. Importers should note that groundwood-containing papers are subject to yellowing over time, a characteristic that end-users in archival or long-shelf-life applications must account for in product specifications.
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Directory paper, free-sheet alternatives for short-life publications, certain catalog and insert papers, and some lightweight packaging substrates commonly use mechanical-fiber-containing grades. The higher mechanical content reduces raw material cost but limits brightness and long-term stability, so these papers are generally not suitable for archival, fine-art, or premium printing applications.
When fiber content is close to the 10% boundary, importers should request a detailed fiber-analysis report from the mill and consider commissioning an independent laboratory test. If the result is ambiguous, a binding ruling request to US Customs and Border Protection before importation is the most reliable way to confirm the correct heading and avoid post-entry reclassification and duty liability.
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Monthly import values over time