Producer
KOC Solution Co., Ltd.
Korean maker of thiourethane/episulfide high-refractive-index optical monomers for spectacle lenses; the main challenger to Mitsui.
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Inputs supplied
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Goods downstream
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Facilities
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Stories
What they make
1 input KOC Solution Co., Ltd. supplies
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Goods downstream
Essential goods that depend on something KOC Solution Co., Ltd. makes — pick one to see the full supply chain.
What else they do
Business segments
The company's full revenue map — where this supply-chain role fits within their broader business.
High-refractive-index optical monomers
Optical & specialty resins
Intelligence
What's known
Sourced claims about this company's role in supply chains — chokepoints, concentration, incidents, dual-use connections.
Concentration2024
The thin, lightweight lenses that anyone with a strong prescription depends on hide one of the most concentrated chokepoints in all of eyewear. High-index lenses (1.67 and 1.74) are cast from a specialized monomer — thiourethane or episulfide resin — and the supply of that monomer has been close to a monopoly: Japan's Mitsui Chemicals (its MR series) long dominated it, with Korea's KOC Solution as essentially the only serious challenger, amid years of patent battles. So a huge share of the world's high-prescription eyeglass lenses, no matter which brand or optical lab finishes them, trace back to a two-or-three-company resin tier. The lens makers and retailers are downstream of a chemistry duopoly that almost no consumer — and few even in eyewear retail — knows exists.
KOC Solution Co., Ltd. ↗Did you know2024
KOC sits one tier beneath the lens manufacturers already tracked in this radar. Companies like HOYA and Essilor cast, coat and distribute the finished lens, but the raw high-index resin they pour into the mold comes from KOC or Mitsui. That means even a lens industry that looks competitive at the brand and lab level shares a single upstream dependency on a couple of Korean and Japanese monomer producers. A disruption at that monomer tier — a plant outage, an export restriction, an adverse patent ruling — would hit every high-index lens brand at once, regardless of which optician sold the glasses. The visible diversity of the eyewear market narrows, two steps up the chain, to a chemistry bottleneck.
KOC Solution Co., Ltd. ↗