Producer
Zhejiang Longsheng Group (LonSen)
World's largest dye and dye-intermediate manufacturer; owns DyStar. ~14% of reactive dyes plus dominant H-acid/intermediate capacity.
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Goods downstream
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Stories
What they make
1 input Zhejiang Longsheng Group (LonSen) supplies
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What else they do
Business segments
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Dyes (incl. DyStar)
Dye intermediates
Specialty chemicals & auxiliaries
Real estate & finance (conglomerate arm)
Intelligence
What's known
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Did you know2024
The colour of the world's blue jeans runs through a Chinese-owned supplier almost no fashion brand names. Zhejiang Longsheng, the world's largest dye maker, acquired DyStar in 2010 — the storied German dyestuffs company spun from Bayer's and Hoechst's dye businesses, which serves ~21% of the global textile-dye market — so a marquee Western chemical brand is now Chinese-controlled. DyStar is also a leading maker of denim indigo (its Indigo Vat 40% is an industry standard), meaning a huge share of the planet's denim is dyed with chemistry owned by a Zhejiang conglomerate. [verify: Longsheng acquired DyStar 2010; ~20% dye share + Bayer/Hoechst origin + indigo confirmed by C&EN]
DyStar ↗Chokepoint2021
A garment's colour traces to a concentrated, pollution-heavy chemical step in China. Longsheng dominates H-acid and other reactive-/disperse-dye intermediates — a narrow upstream chokepoint where China is effectively single-source for much of world supply. When Chinese environmental inspections periodically shut intermediate plants in Zhejiang and Jiangsu, global dye prices spike and lead times stretch, forcing formulators worldwide to pre-position stock. So a cheap T-shirt or a car-interior textile carries hidden exposure to Chinese environmental policy and a handful of intermediate makers. [verify: Longsheng top dye/H-acid maker, China env shutdowns spike prices confirmed; India also produces]
Kiri Industries ↗