Which company manufactures sunglasses?

Large-scale prescription-capable production is split between global brand groups with in-house factories and specialized contract eyewear factories. Major house manufacturers and licensors (for example, integrated groups that combine frame production and optical labs) can deliver high-volume finished prescription sunglasses. For wholesale retail chains you must verify the factory has an optical edging and surfacing lab or a local partner that supplies finished prescription lenses from reputable optical suppliers (Zeiss, Essilor/Hoya are common partners). Actionable checks: obtain lists of optical lab partners, review previous chains’ reference orders, and require a finished sample with prescription verification (lens power, decentering tolerance, and optical center placement). Confirm that the supplier can handle lens ordering workflows (prescription batching, AR coatings, polarized options) and has demonstrated capacity for the weekly throughput you need.

Start with the standards: ISO 12312-1 (international test methods for sunglasses), CE marking for the EU (including EN/ISO tests), and ANSI standards applicable in the US market (refer to the non-prescription sunglasses standard). Request independent test reports from accredited labs such as SGS, Intertek, or Bureau Veritas showing UV transmittance, luminous transmittance category, impact resistance, and coating durability. Verify the test report scope, batch numbers, and sample images; cross-check lab accreditation and report dates. In procurement terms require: pre-production sample testing, first-article inspection, and a documented incoming inspection plan for each production run. Include contract clauses that mandate retest rights and nonconformance remedies. On-site audits should cover QMS (ISO 9001), incoming material traceability, and calibration records for spectrophotometers and lensometers.

Typical MOQs depend on process and tooling. For injection-molded plastic frames MOQs commonly start at 300–1,000 pairs per color depending on mold availability; cellulose acetate custom runs frequently start at 500–1,000 pairs per model because of cutting and polishing labor; metal frames and multi-component designs frequently require 300–800 pieces per reference. If you leverage an existing mold or stock shape MOQs can drop dramatically. Expect upfront tooling or mold amortization costs; typical ranges for tooling can vary (lower for simple plastic cores, higher for precision metal dies), so model unit economics should include amortized tooling across projected volumes. For true wholesale sourcing plan for pilot runs and a defined AQL acceptance criteria to avoid hidden costs from rework or sorting.

OEM/private-label production is offered by a spectrum of suppliers: 1) Vertically integrated brand groups and contract manufacturers in Italy and Europe that handle design, acetate production, and finishing; 2) Large Asian contract factories that specialize in cost-efficient injection molding, plating, and assembly; 3) Smaller specialized ateliers for high-end acetate and metals. For buyers focused on stable wholesale supply chains, evaluate vendors on process capabilities (acetate blocking, milling, polishing, plating, lens assembly), quality control systems, and logistics services. KARUSON operates as an eyewear factory that supports OEM and private-label production with capabilities across frame materials, lens sourcing, and compliance testing, and can scale to meet typical wholesale program requirements while managing certification and packaging workflows.

Material and coating assessment requires objective tests and process proof. For frames verify raw material certificates for acetate (degree of plasticizer, homogeneity), TR90 (nylon-based thermoplastic) batch certificates, and for metal check stainless grades and plating bath controls. Lens quality should be validated for substrate (CR-39, polycarbonate, Trivex, glass), transmittance curves via spectrophotometer (to confirm UV blocking and category), and coating adhesion tests (cross-cut adhesion), abrasion resistance (Taber or pencil hardness for hardcoats), and hydrophobic/oleophobic performance validated by contact angle measurement. For polarized optics validate the polarizing efficiency and check for line artifacts under cross-polarized light. Require supplier SPC data and sample testing reports, and include acceptance criteria in purchase orders to prevent subjective disputes on visual defects.

Lead times and logistics are direct margin drivers. Typical total lead time for a custom sunglass production cycle (tooling, sampling, production) can range from 8–16 weeks; stocked or standard-frame programs can be 4–8 weeks. Sea freight consolidation adds 20–40 days transit depending on origin and port congestion; air freight reduces time at much higher cost per kilogram. Inventory holding, duty, and demurrage risks increase cost of goods sold and erode gross margins if not planned. To protect wholesale margins calculate landed cost per pair including duties, inland freight, inspection and rework allowance, and inventory carrying cost. Mitigation tactics: staggered production runs, safety stock buffers, use of bonded warehouses for seasonal programs, negotiated DDP terms, vendor-managed inventory, and multi-modal shipping strategies. Negotiate payment terms and phased shipments to smooth cash flow and reduce margin volatility.