How to start your own sunglasses brand?

Eyewear Factory: 6 Practical Answers for Launching a Sunglasses Brand

Launching private label sunglasses through an eyewear factory requires technical, commercial and legal clarity. Below are six long-tail, buyer-focused questions that are often poorly answered online, with practical, factory-level answers you can act on.

1. What are realistic total startup costs (prototyping, mold tooling, MOQ, tests, and packaging) to launch a single sunglasses SKU through an OEM eyewear factory?

Break the budget into discrete, real-world line items and use conservative ranges:

• Design & prototyping: $300–$1,500. Rapid 3D printed prototypes cost $50–$300; finished functional prototypes with proper hinges and demo lenses run $300–$1,500.
• Mold/tooling (injection-molded plastic frames): $2,000–$15,000 per mold. Soft (aluminum) tooling can be $1,000–$4,000; hardened steel multi-cavity molds for high-volume runs drive toward $8,000–$20,000 or more.
• Acetate production set-up: $500–$3,000 for cutters and master patterns (CNC patterns are common). Acetate requires block milling and polishing labor, so tooling is lower but per-unit labor is higher.
• Lens tooling / dies (if custom lenses/polarized): $500–$6,000 depending on supplier and whether lenses are prescription-ready.
• First production run (MOQ x unit price): Expect 300–1,000 pairs minimum per SKU x $6–$40 per pair depending on materials, lenses, and finishing. A realistic benchmark for a middle-market private label SKU: MOQ 500 pairs x $12/unit = $6,000.
• Certification & lab testing: $300–$1,200 per test batch. Common test items include UV400 verification, polarization, VLT/filter category, impact resistance and marking compliance (ANSI/ISO/EN). Use SGS/Intertek/TÜV—typical single-lab report runs $400–$1,000.
• Packaging, labels, barcodes: $0.50–$3.00 per unit for branded boxes, pouches, and care cards; initial packaging die and artwork set-up $200–$800.
• Shipping and duties: variable—example: sea freight for 500 pairs in a carton allocation: $200–$800; airfreight higher. Customs duties depend on HS codes and country.

Example conservative total to launch one SKU (500 pairs): design/prototype $800 + tooling $4,000 + production $6,000 + testing $800 + packaging $500 + shipping $500 = ~ $12,600. Expect +/- 30% variance depending on lens complexity, frame material, and location.

2. How can I reduce MOQ and tooling cost when ordering multiple colorways and sizes from an OEM sunglasses manufacturer?

Practical strategies factories and experienced private-label brands use:

• Use stocked (existing) molds: Many factories maintain popular frame molds with colorway availability; MOQ per colorway can drop to 50–200 pairs if you accept an existing mold and standard dimensions.
• Choose vapor/painted finishes vs. custom molds: If you can accept a standard frame shape and apply unique colorways or soft-touch paints, you avoid additional mold costs.
• Batch colorways via small-batch soft tooling: Aluminum/epoxy soft tooling and rapid injection runs can reduce upfront tooling to $1,000–4,000 for a short-run to validate the market.
• Negotiate combined MOQ across SKUs: Ask factories to aggregate different SKU colorways into one production run to reach economical cavity utilization (e.g., 4 colors x 125 pairs = 500 pairs MOQ).
• Use modular components: Keep temples or hinges standardized and vary only the front frame. This lowers unique tooling and allows mix-and-match per order.
• Leverage lens inventory options: Stock lens blanks (CR-39, TAC polarized) are cheaper than custom prescription lens runs; this reduces MOQ pressure tied to custom lens tooling.

Key action: request factory’s “stock mold” inventory and ask for a breakdown of incremental cost to add a colorway. Many factories will share a per-color price schedule if you commit to prepayment terms or slightly higher per-unit pricing for lower volumes.

3. Which frame materials (acetate vs. TR90 vs. metal) deliver the best balance of durability, cost, and perceived brand positioning for High Quality vs. budget sunglasses?

Material trade-offs—real factors buyers must weigh:

• Acetate (natural cellulose): Perceived High Quality look with layered colors and patterns. Pros: high-end finish, adjustable fit via heat, good for High Quality branding. Cons: heavier, higher labor cost (CNC milling, hand-finishing). Typical unit cost: moderate–high ($8–$35/unit finished).
• TR90 / Grilamid (thermoplastic): Extremely lightweight, flexible, impact-resistant. Pros: low cost, durable, ideal for sport/comfort. Cons: fewer high-gloss layered color effects compared to acetate. Typical unit cost: low–moderate ($4–$18/unit).
• Metal (zinc alloy, stainless steel, titanium): Sleek, slim silhouettes. Pros: looks High Quality, precise CNC machining, thinner profiles. Titanium is High Quality (lightweight, hypoallergenic) but expensive. Typical unit cost: moderate–high ($6–$40/unit depending on metal).
• Combined (acetate fronts + metal temples): Common in mid-to-High Quality segments to balance look and cost.

Guidance by positioning:

• Budget/fashion: TR90 or injected nylon frames with TAC lenses—lower tooling and unit cost, higher volume flexibility.
• Contemporary/High Quality: Acetate front with stainless or plated temples—higher perceived value, slower production, higher tooling/labor.
• Performance/sport: TR90/Grilamid or injected polycarbonate bodies with polarized polycarbonate lenses for impact resistance and low weight.

Ask the factory for side-by-side samples (physical) and a cost breakdown by material type—don’t rely only on photos. Material selection will drive tooling approach, lead time and QC checks.

4. What exact quality-control tests and tolerances should I specify (UV/lens, VLT, frame warp, hinge durability) to pass EU/US retail and minimize returns?

Specify tests and acceptable tolerances in your purchase order and quality agreement. Important tests and typical acceptance ranges:

• UV protection: Require UV400 certification (blocks UVA and UVB up to 400 nm). Test method per ISO 12312-1; receive laboratory report from SGS/Intertek/TÜV.
• Filter category / VLT (Visible Light Transmission): Specify target filter category (0–4). Typical sunglasses are Category 2 (18–43% VLT) or Category 3 (8–18% VLT). Lab report should show measured VLT and category.
• Polarization: For polarized claims, request polarization efficiency ≥ 97% and an independent polarization test report. Polarized TAC laminated lenses are common; specify anti-reflective or mirror coatings if needed.
• Impact resistance: ANSI Z80.3 or local equivalent—specify ball-drop/impact tests as required for your market or retail partners.
• Frame dimensional tolerance & warp: Provide critical dimensions (DBL, lens width, temple length, frame height) and allowable tolerances (±0.5 mm is common for molded frames). Require warp check under 24-hour conditioning and visual inspection.
• Hinge durability: Require open/close cycle testing; 10,000 cycles is a common durability benchmark for High Quality frames, 5,000 cycles for standard lines. Specify no more than x% increase in hinge torque after cycle test (define acceptance criteria) and no loosening or fracture.
• Surface & coating: Adhesion and abrasion tests for anti-scratch/mirror coatings. Require salt-spray or plating adhesion tests for metal finishes if marketed as corrosion-resistant.
• AQL (Acceptable Quality Level): Use AQL inspection for production (commonly AQL 2.5/4.0 with classifications for critical/major/minor defects). List what constitutes critical defects (e.g., lens not UV400, broken hinge), major defects (fit issues, cosmetic scratches), and minor defects (small coating specks).

Include a clause that pre-shipment inspection by an independent 3rd party (SGS, Bureau Veritas, AsiaInspection) is required and that failed lots must be reworked or replaced at the factory’s cost. Keep test reports and batch numbers for traceability.

5. How do I protect my design and brand when working with factories in Asia—what contract terms, tooling ownership and IP clauses should I insist on?

IP protection is a common pain point. Practical protections:

• Non-Disclosure Agreement (NDA) & Non-Compete: Sign a strong NDA before sharing CAD files and samples. NDAs should include clear definitions of confidential information, duration (typical 3–5 years), and remedies for breach.
• Tooling Ownership Clause: Specify in the contract who pays for tooling and who owns molds. If you pay for tooling, contract should state tooling is your property, stored separately, and cannot be used to produce other products without written permission.
• Design Registration & Patents: Where applicable, register designs (design patents in the U.S., Community designs in EU, design registrations in China/HK) before large-scale sampling. Registered designs create stronger enforcement options.
• Trademark & Labeling: Register brand trademarks in priority markets before launch. Insist factory uses branded labels and invoices as directed and prohibits unauthorized use of your marks elsewhere.
• Contractual Audit & Penalties: Include audit rights to inspect production records, raw material purchase orders and serial numbers. Include financial penalties for IP infringement and a requirement for immediate cessation and compensation.
• Escrow of CAD/PAT Files: Use escrow for critical CAD and CAM files; require written authorization for any third-party use. Consider stamping molds with hidden identifiers linking to your company.
• Work with vetted factories and use trade assurance/payment terms that protect you (example: escrow or staged payments tied to 3rd-party inspection). Also consider small initial orders to test compliance before scaling.

Enforcement is jurisdiction-dependent. Use local counsel for registration and enforcement in key manufacturing countries; collaborate with IP agents to take quick action if infringement occurs.

6. What is the typical timeline and milestone schedule from design to delivery for a 1,000-pair launch, and where do delays commonly occur?

Typical timeline (typical mid-market SKU, injection-molded frames, non-prescription lenses):

• Concept & CAD revisions: 1–2 weeks.
• Prototype & fit samples (3D print + functional prototype): 2–4 weeks.
• Tooling/mold fabrication: 3–8 weeks (aluminum) or 6–12 weeks (hardened steel complex mold).
• First article inspection & sample approval: 1 week after initial production samples available.
• Mass production run: 2–6 weeks depending on factory load and complexity.
• Finishing (coating, plating, lens assembly), quality control & packing: 1–2 weeks.
• Third-party inspection and testing: add 3–10 days depending on lab and tests required.
• Shipping (sea freight typical): 20–45 days door-to-door depending on routes and customs. Air freight: 3–7 days but costly.

Realistic total: 10–20 weeks from first concept to arrival at a U.S./EU port for a new injection-molded SKU. For acetate or complex metal frames, add 3–6 weeks.

Common delay points and mitigation:

• Tooling rework: Avoid by approving iron/steel prototypes and insisting on first-article sample checks before mass run.
• Color matching & plating: Provide physical color references (not just Pantone) and pre-approve plated samples. Expect iteration here—factor 1–2 extra weeks.
• Component shortages (hinges, screws, polarized film): Plan with vendors and ask factories for alternate approved suppliers in PO.
• Lab testing backlogs: Book test labs in advance and allow lead-time for retests when needed.
• Customs and paperwork: Ensure accurate HS codes, country-of-origin, and required certificates (lab reports, declaration of conformity). Use experienced freight forwarders.

Insist on a milestone schedule in your agreement tied to payments and hold a pre-production meeting to confirm timelines and ramp capacity.

Conclusion: Advantages of partnering with an experienced eyewear factory

Working with a reputable OEM/eyewear factory gives you access to tested manufacturing processes (injection molding, acetate CNC finishing, lens laminating), existing tooling pools, vendor networks for polarized and UV400 lenses, and established QC workflows (AQL, third-party labs such as SGS/Intertek). This lowers time-to-market, reduces per-unit costs at scale, and provides compliance documentation needed by retailers. Combining clear specifications (materials, VLT/filter category, durability tests), IP protections (NDAs, tooling-ownership clauses) and a well-defined milestone schedule will materially reduce risk and launch friction.

For a detailed quote, sample options, or to review our stocked molds and MOQ tiers, contact us for a personalized estimate: www.karusonco.com or email nicole@karusonco.com.