U.S. exports of Unbleached Chemical Wood Pulp, Sulfite (Non-Dissolving) (SITC 25161) totaled $293K in August 2026, exported to 9 countries.
Last updated: August 2026 dataUnbleached sulfite pulp occupies a niche position in the chemical pulp market, produced by cooking wood chips in a sulfurous acid-based liquor rather than the dominant kraft (sulfate) process. The sulfite process yields pulp with different fiber characteristics — generally lower strength than kraft but with properties suited to specialty papers, glassine, and certain absorbent grades. Sulfite pulp production has declined significantly relative to kraft globally, making supply more concentrated and trade volumes smaller than for kraft grades.
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Glassine and greaseproof papers, certain tissue grades, and some absorbent specialty papers continue to use sulfite pulp because its fiber characteristics — including lower lignin interference and specific bonding behavior — suit those applications. The pulp's compatibility with certain chemical treatments also makes it preferred for a narrow range of industrial specialty grades.
The sulfite process uses acidic or bisulfite cooking liquors to dissolve lignin, producing fibers that are generally brighter in their unbleached state than unbleached kraft but with lower tensile and tear strength due to differences in fiber bonding. Kraft cooking under alkaline conditions preserves more fiber strength. This strength differential is why kraft has displaced sulfite as the dominant process for most commodity paper grades.
Basic heading 168 of 239 in section 2
Basic heading 25161 · $293K of $7.8B
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Exports · August 2026
destination
United Kingdom and Canada together take 89% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
Exports
Exports
$293KYoY · free account
Over the twelve months to August 2026, the U.S. exported $2.7M of Unbleached Chemical Wood Pulp, Sulfite (Non-Dissolving).
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026. Source: U.S. Census Bureau.