7 Costly Mistakes US Importers Make When Sourcing Titanium Eyewear Frames from Korea

Importing titanium eyewear frames from Korea into the US involves more compliance risk than most buyers expect. Material labeling errors — including calling a beta-titanium frame "full titanium" — can trigger FTC enforcement action under Section 5 of the FTC Act, while missing FDA registration or using paper labels for country-of-origin marking can result in CBP shipment detention. This guide covers the seven most common mistakes US importers make with titanium eyewear frames and the specific steps to avoid each one.

Why Compliance Errors Cost More Than Import Duties

Sourcing titanium eyewear frames from Korea looks straightforward on paper. The KORUS FTA brought the base duty rate to zero, Korean manufacturers hold ISO 12870 certification, and the frames pass a quick magnet test. That confidence is exactly where compliance problems begin.

US importers of titanium spectacle frames face three enforcement agencies: FDA, CBP, and FTC. Each has independent requirements, and getting all three right before your first container ships is not difficult once you know what each agency expects. Getting them wrong, however, can erase months of sourcing savings in a single customs hold or regulatory action.

These are the seven mistakes that cost US importers the most — and the documented facts you need to avoid each one.

Mistake 1: Accepting "Full Titanium" Claims Without ISO 12870 Proof

The most expensive mistake is also the most common: accepting a supplier's "full titanium" or "pure titanium" label without asking for the test report that backs it up.

ISO 12870:2024 defines three distinct titanium grades for spectacle frames. A "titanium frame" (F-Ti) must contain at least 70% titanium by mass in each principal component. A "pure titanium frame" (S-Ti) requires at least 90% titanium by mass. A titanium-niobium frame (Ti-Nb) contains 50–70% titanium with niobium, per Shim Sight — ISO 12870:2024 Ophthalmic Optics Reference.

Beta-titanium — the alloy used in most Korean titanium frames — qualifies as a "titanium frame" (F-Ti, ≥70%), not a "pure titanium frame" (S-Ti, ≥90%). These are two different ISO grades with different material thresholds. Selling or labeling a beta-titanium frame as "pure titanium" or "full titanium" at retail conflicts with ISO 12870's definitions.

The FTC enforces material content claims under Section 5 of the FTC Act, which prohibits material misrepresentations in product labeling and advertising. Civil penalties run up to $51,744 per violation per day. To understand the enforcement scale: in January 2024, the FTC imposed a $2 million civil penalty on Kubota North America Corporation for false "Made in USA" labeling — the largest in US product labeling enforcement history, per Barnes & Thornburg LLP. Eyewear titanium content claims carry comparable enforcement risk under the same statute.

HP Glasses also documents a well-known fraud tactic: suppliers etching "PURE TITANIUM" on the inner arm of frames made from cheap alloys or titanium-coated stainless steel. Sellers have also de-magnetized steel frames to mimic titanium's non-magnetic properties, allowing them to pass a basic magnet test while remaining non-titanium.

What to do: Require the supplier to provide an ISO 12870 test report explicitly stating titanium content by percentage mass for each principal frame component. Use "titanium eyewear frame" or "beta-titanium frame" in all US retail packaging and marketing materials — not "full titanium" or "pure titanium" — unless a certified lab report confirms ≥90% titanium by mass.

Mistake 2: Skipping FDA Establishment Registration

Spectacle frames are classified as FDA Class I medical devices under 21 CFR 886.5842. This surprises many first-time eyewear importers. The practical compliance consequence: both the foreign manufacturer and the US importer of record must register with the FDA annually before the first shipment enters US commerce.

Per LensAdvisor — FDA Requirements for Importing Eyewear into the US, the three required steps are:

• Annual FDA establishment registration under 21 CFR Part 807 — the FY2025 registration fee is $9,280
• Appointment of a US Agent to serve as the FDA's official contact for the foreign manufacturer
• Individual device listing for each eyewear frame model in the FDA device listing system

The 510(k) premarket notification requirement is exempt for spectacle frames — you do not need FDA pre-approval to import. But registration and listing are mandatory before any commercial shipment. Importers who skip these steps risk CBP holds at the port of entry, where FDA-flagged shipments are routinely held for documentation review before release.

What to do: Complete FDA establishment registration before your commercial shipment leaves Korea. Budget $9,280 for the FY2025 annual registration fee. Designate a US Agent, verify your facility is registered in the FDA database, and confirm each frame model is individually listed. Renew annually — registration lapses result in shipment holds at the same checkpoints.

Mistake 3: Using Adhesive Labels for Country-of-Origin Marking

Under 19 CFR Part 134, every article of foreign origin imported into the US must be marked permanently, conspicuously, and in English with the country of origin name, per Cornell Law School LII — 19 CFR § 134.11.

For metal eyewear frames, "permanently" has a specific legal meaning. CBP accepts die-stamping, cast-in-mold lettering, electrolytic etching, engraving, or a securely affixed metal plate. Adhesive labels and paper labels are explicitly insufficient — CBP's regulation states that marking methods that can be removed without defacing the article are not adequate.

Many Korean suppliers default to paper stickers for cost convenience. If those stickers are the only country-of-origin marking on the frame, the shipment is non-compliant. CBP may require re-marking at the importer's cost, assess marking duties of 10% of the dutiable value, or detain the shipment pending correction. If goods are re-exported or destroyed as a result, you absorb the full loss.

What to do: Specify in your purchase order that "Made in Korea" must be permanently marked directly on the frame — not only on outer packaging. Request a marked sample for approval before bulk production. Confirm the marking method (die-stamp, electrolytic etch, or equivalent) in writing from your supplier.

Mistake 4: Ignoring the New 10% Tariff Surcharge on Korean Frames

Until February 2026, US importers of Korean titanium eyewear frames under HTS subheading 9003.19.0000 benefited from the KORUS FTA base rate of 0%, per Dutiable.io — HTS Code Reference for Optical Frames. Many cost models, distributor pricing agreements, and margin targets were built on this zero-duty assumption.

That changed. As of February 24, 2026, a 10% Section 122 surcharge applies to Korean imports, per GingerControl — Importing from South Korea: KORUS FTA, Duty Rates, and Customs Fees. The KORUS base rate remains 0%, but the surcharge stacks on top, making the effective total duty on Korean titanium eyewear frames 10%.

Additional fees also apply: a Merchandise Processing Fee of 0.3464% (minimum $29.66 per entry) and a Harbor Maintenance Fee of 0.125% on the CIF value.

A buyer importing 10,000 frames at $30 CIF each ($300,000 CIF value) now faces approximately $30,000 in Section 122 duty alone — a cost not included in any pre-February 2026 landed cost model.

What to do: Recalculate your landed cost using CIF value × 10% duty, then add MPF and HMF. Revise all margin models and distributor pricing agreements that assumed zero duty. Discuss the duty change with your Korean supplier — some manufacturers are willing to adjust FOB pricing or adjust order quantities to help offset the new tariff environment.

Mistake 5: Not Running Physical Authenticity Tests on Samples

Material fraud is documented throughout the eyewear supply chain. Sellers etch "PURE TITANIUM" on alloy frames and de-magnetize steel frames to pass a basic magnet test while remaining non-titanium, per HP Glasses — How to Identify Real Titanium Eyeglass Frames. Three field tests give importers a practical pre-purchase screen before committing to bulk orders.

Weight test: Genuine titanium frames weigh under 10g excluding lenses. Frames heavier than 13g for a standard adult size are likely alloy imitations, per HP Glasses.

Plating inspection: Genuine titanium uses IP (ion plating) vacuum deposition, producing a duller finish that does not flake. Low-cost alloy frames use water electroplating, producing a brighter sheen that peels in flakes.

Weld seam inspection: Argon arc welding — the method used in authentic titanium frame manufacturing — leaves smooth, flush weld seams at hinge joints. Hill-like raised weld marks at the same points indicate alloy construction, per HP Glasses. Request hinge inspection photos from the supplier before finalizing any bulk order.

These tests are not substitutes for ISO 12870 certified lab analysis, but they help identify obvious substitutions at the sample stage, before you have committed to production payment.

Mistake 6: Assuming EU Nickel Certification Covers California

ISO 12870:2024 requires that metal frame parts in contact with skin must not release more than 0.5 μg/cm²/week of nickel when tested per EN 16128, per Shim Sight. Many Korean manufacturers hold EU EN 1811 nickel-free certification to meet this threshold for European distribution.

The mistake: assuming that EU certification is sufficient for the entire US market.

California Proposition 65 restricts nickel in consumer products sold in California independently of EU EN 1811 standards, per ComplianceGate — Sunglasses and Eyewear Regulations in the United States. Titanium frames bearing EU nickel-free certification may still require separate third-party Prop 65 nickel testing before California retail distribution. Testing costs approximately $200 per SKU as a minimum.

Importers selling to national retailers with California distribution — including e-commerce platforms, optical chains, or mass-market retailers — need both EU nickel compliance documentation and separate Prop 65 clearance for California-destined inventory.

What to do: Confirm directly with your supplier whether they have completed third-party Prop 65 nickel testing for California. If not, budget for per-SKU testing before any California-bound shipment. Do not assume EU EN 1811 certification transfers automatically to California Prop 65 compliance — they are separate regulatory requirements.

Mistake 7: Accepting Test Report Claims Without Verifying the Reports

A supplier who claims ISO 12870 compliance but cannot produce specific test reports within 48 hours of your request has likely not run the tests. Accepting verbal claims or general certification statements without reviewing the actual lab documentation is a compliance gap that experienced importers have paid for.

Two key test reports to require for every frame model before bulk commitment:

Salt spray corrosion test (ISO 9227 or ASTM B117): Frames must show no rust, discoloration, or coating damage after 24–72 hours of chamber exposure, per Eyewearglobo — 20 Must-Check Quality Points for Titanium Eyeglass Frames. This is the benchmark test for ISO 12870 corrosion resistance compliance.

Perspiration resistance test: Per Amade-Tech — ISO 12870 Spectacle Frame Testing, frame parts in contact with skin must show no corrosion or coating separation after 24 hours at 55±5°C in artificial sweat solution. This is the ISO 12870 test confirming whether a frame's IP coating will hold under daily wearing conditions.

When reviewing test reports, confirm that the report names the specific frame model in your purchase order, states the titanium content percentage, and shows the actual test date. Reports that list only product families without model-level detail, or that are more than 24 months old, should not be treated as current compliance documentation.

How to Source Titanium Frames Without These Risks

The seven compliance issues above are predictable — and Korean frame manufacturers who supply the US market regularly deal with each one. What separates a smooth first shipment from a costly CBP hold or FTC inquiry is asking the right questions early and receiving the documentation before the purchase order is signed.

A supplier briefing package for Korean beta-titanium eyewear frames should include: ISO 12870 test reports with model-level titanium content percentages, EN 1811 nickel release results, salt spray and perspiration resistance test certificates, FDA establishment registration confirmation, and a sample showing compliant country-of-origin permanent marking.

If you are evaluating Korean titanium eyewear suppliers for the US market and want help reviewing supplier documentation, confirming FDA registration status, or building a landed-cost model that reflects the current 10% duty environment, our team is available to assist.

Frequently Asked Questions

What is the practical difference between a beta-titanium frame and a pure titanium frame — does it matter for US retail labeling?

Yes, it matters significantly. According to ISO 12870:2024, a "titanium frame" (F-Ti) contains at least 70% titanium by mass per principal component, while a "pure titanium frame" (S-Ti) requires at least 90% titanium by mass, per Shim Sight. Labeling a beta-titanium frame as "pure titanium" or "full titanium" is a material misrepresentation under FTC Act Section 5, which can result in civil penalties of up to $51,744 per violation per day. Use "titanium frame" or "beta-titanium frame" in US retail labeling — not "full titanium" or "pure titanium" — unless an ISO 12870 test report confirms ≥90% titanium by mass.

What FDA registration steps must I complete before my first titanium eyewear frame shipment enters the US?

Spectacle frames are FDA Class I medical devices under 21 CFR 886.5842. Per LensAdvisor, you must: (1) register your establishment with the FDA annually under 21 CFR Part 807 — the FY2025 fee is $9,280; (2) appoint a US Agent to serve as the FDA's official contact for the foreign manufacturer; and (3) list each eyewear frame model individually in the FDA device listing system. Completing these steps before your commercial shipment leaves Korea prevents CBP holds at the port of entry.

Is a printed sticker or paper label enough to satisfy country-of-origin marking for titanium eyewear frames?

No. Under 19 CFR Part 134, per Cornell Law School LII, metal eyewear frames must carry a permanent, conspicuous, English-language country-of-origin mark. Acceptable methods include die-stamping, electrolytic etching, engraving, cast-in-mold lettering, or a securely affixed metal plate. Adhesive labels and paper labels are explicitly insufficient and will trigger CBP marking violations — which can result in shipment detention, mandatory re-marking at the importer's expense, or re-export.

How has the 2026 Section 122 surcharge changed the effective tariff on Korean titanium frames?

As of February 24, 2026, Korean titanium eyewear frames (HTS 9003.19) are subject to a 10% Section 122 surcharge stacked on top of the KORUS FTA base rate of 0%, per GingerControl — making the effective total duty 10%. A Merchandise Processing Fee of 0.3464% (minimum $29.66 per entry) and a Harbor Maintenance Fee of 0.125% apply on top. Any cost model built before February 2026 that assumed zero duty under KORUS needs to be revised before you finalize pricing with US buyers.

Does California Proposition 65 require separate nickel testing even if my Korean supplier already holds EU EN 1811 nickel-free certification?

Yes. California Prop 65 restricts nickel in consumer products sold in California independently of EU EN 1811 certification, per ComplianceGate. Frames with EU nickel-free certification may still require separate Prop 65 nickel testing before California distribution. Third-party Prop 65 testing costs approximately $200 per SKU as a minimum. Do not distribute to California retail without confirming Prop 65 compliance separately from EU certification.

This information is provided for reference purposes only. Regulatory requirements — including FDA registration fees, CBP marking rules, FTC enforcement thresholds, and tariff rates — are subject to change. Always confirm current requirements with the relevant agency or an authorized trade compliance expert before making import or purchasing decisions.