OEM Sunglasses Terms to Confirm Before the PO

This article is for overseas eyewear brands, importers, distributors, and retailers placing OEM sunglasses orders with a Chinese supplier. Its purpose is simple: remove vague terms before the purchase order turns into a production dispute. Use it to confirm specifications, tolerances, approval samples, defect rules, compliance documents, rework responsibility, delivery terms, MOQ logic, price basis, and reorder controls before money, materials, packaging, or tooling are committed.

Use a Production Agreement, Not Only a PI

A proforma invoice is not enough for OEM sunglasses. A PI usually confirms item name, quantity, unit price, payment terms, and estimated shipment date. Those details matter. They do not answer the hard production questions.

What happens if the lens tint is darker than the approved sample? What if hinge tension is uneven, the logo fails an agreed abrasion check, or cartons are not ready for the booked vessel? If the answer is not written down, both sides will argue after the problem appears.

The production agreement should sit beside the PO and PI. It does not need to be long, but it must be usable on the factory floor. At minimum, the working file should include the approved sample record, final spec sheet, packaging file, artwork, compliance requirements, QC standard, inspection method, and delivery plan. If documents conflict, the agreement should say which one controls. A practical structure is this: the approved gold sample and final written spec sheet control appearance, dimensions, materials, and workmanship; the PO controls quantity, price, Incoterm, payment, and shipment terms.

Do not rely on chat history as the final authority. Sales messages move fast. Production needs fixed instructions. Lock the following before deposit: frame material, color reference, lens material, lens category, decoration method, logo position, packaging, inspection level, acceptable defects, rework cost owner, shipment window, and reorder rules. A capable factory can manage strict requirements. It cannot manage moving targets without extra cost, schedule risk, and avoidable disputes.

Freeze the Spec Sheet Before Deposit

The spec sheet is the buyer's main protection. It should describe the product in production language, not catalog language. For sunglasses, that means dimensions, material, color, surface finish, lens performance, hinge type, screw color, nose pad style, logo process, packaging, carton packing, and target market requirements.

Tolerances must fit the material and process. Injection frames are usually more consistent once tooling and material are stable, but color, shrinkage, and fit can change if resin, pigment, or process settings change. Acetate sheets can vary in pattern, thickness, and color depth. Cutting, tumbling, and polishing also affect edge feel and final dimensions. TR90 is flexible and light, so temple opening, recovery, and symmetry need checks. Metal frames need clear requirements for plating, solder quality, screw fit, nose pad alignment, and corrosion resistance.

Common working tolerances for OEM sunglasses may cover frame width, temple length, lens width, bridge, logo position, temple opening angle, and product weight. Do not copy generic tolerances. Confirm what the supplier can hold for the specific material, tooling, and decoration process, then put those values in the spec sheet. Lens color should be approved against the signed sample under agreed light conditions, such as D65 light or natural daylight. A showroom lamp is not enough.

If the design uses several decoration or finishing steps, add checkpoints for each one. A logo plate, mirror coating, gradient tint, hot stamp, pad print, laser mark, or custom case can each create a separate failure point. More custom work means more detail in the spec sheet.

• Frame: material, color reference, finish, dimensions, hinge, screw, nose pad, temple opening, symmetry, and surface quality.
• Lens: PC, TAC, nylon, CR39, or other agreed material; tint; UV protection requirement; filter category; polarization; mirror or anti-scratch coating; and optical standard if required.
• Branding: vector artwork, size, position, color, process, curing or fixing method, and agreed abrasion or adhesion check.
• Packaging: pouch, case, cloth, instruction leaflet, barcode, retail box, carton mark, inner box quantity, master carton quantity, and master carton size.
• Compliance: target market and documents such as CE EN ISO 12312-1, ANSI Z80.3, AS/NZS 1067, REACH, or FDA registration where applicable.

Define Approval Samples and Change Control

Samples are not souvenirs. They are control tools. The buyer should specify which sample becomes the gold sample and where it is kept. For higher-risk or private-label orders, the factory should keep one signed sample and the buyer should keep one matching signed sample. The approval record should include the date, SKU, sample version, open issues, and whether the sample is approved for bulk production.

Approval should be written. A message saying the sample looks good is weak. Use direct language: approved for bulk production, except for the changes listed below. If you approve a black PC frame but later request translucent grey after resin or components are ordered, that is a change order. It is not a factory mistake. If you approve pad printing and later ask for a recessed metal logo plate, that changes cost, tooling, assembly time, and QC risk.

The agreement should define which changes require a new sample or written re-approval. Lens tint changes, polarized lens changes, mirror coating changes, logo process changes, new metal parts, acetate sheet changes, hinge changes, plating changes, frame material changes, and packaging structure changes usually need re-approval. Minor carton mark edits may not, but they still need written confirmation. Use a simple rule: if a change affects function, appearance, compliance, durability, or packaging fit, sample again or obtain written technical confirmation before production continues.

For custom molds, confirm mold ownership, storage, maintenance, modification rights, exclusivity, and inactivity rules. If the buyer pays for exclusive tooling, the agreement should state whether the factory is prohibited from using that mold for other customers. If the factory owns or subsidizes the mold, exclusivity may not apply unless separately negotiated. Also define who pays for mold repair after normal wear and whether dimensional corrections after trial samples are included in the tooling fee.

Choose QC Standards Buyers Can Enforce

QC language must be measurable. Words like good quality or premium quality do not help an inspector accept or reject a shipment. Define inspection timing, sample size, defect classes, test methods, and acceptance limits. Many buyers use AQL final inspection for sunglasses, but the exact inspection level and AQL limits should match the product risk, order size, destination market, and retail channel requirements.

A typical order should include incoming material checks, in-process checks, final inspection, and carton inspection. During production, the factory should check for color mismatch, lens defects, hinge tension issues, loose screws, logo defects, uneven polishing, coating marks, sharp edges, missing accessories, and packaging errors before final packing. At final inspection, the buyer or third-party inspector should have the approved sample, spec sheet, artwork, packaging file, barcode list, and defect classification list.

The agreement should state who pays for rework and re-inspection if the first inspection fails. Keep the rule clear. If failure is due to factory workmanship, wrong material, wrong lens, wrong packaging, or unapproved substitution, the factory pays for rework and re-inspection. If failure is due to buyer artwork error, late spec change, incorrect barcode file, or a wrong approved sample provided by the buyer, the buyer pays the related correction cost unless both sides agree otherwise.

Put Compliance Documents in the Contract

Compliance is not one document. It depends on destination market, lens type, product claims, age category, and selling channel. For sunglasses, buyers commonly request CE EN ISO 12312-1 for the EU, ANSI Z80.3 for the United States, AS/NZS 1067 for Australia and New Zealand, REACH for chemical restrictions, and FDA registration where applicable for U.S. requirements. ISO 9001 and BSCI may support supplier evaluation, but they are management and social compliance systems. They do not replace product-level lens, optical, impact, labeling, or chemical testing.

The agreement should define whether existing test reports are acceptable or whether the buyer needs new model-specific testing. Existing reports may work for repeat styles using the same frame material, lens material, tint family, coating, and supplier process. New tests are safer when the lens color, mirror coating, polarized film, frame material, child-size design, product claim, supplier, or target market changes.

Ask for exact document details: standard name, report date, model or material coverage, issuing lab, tested lens category, sample description, and whether the report matches your SKU. Do not accept vague promises such as can pass EU standard. If your retailer requires a nominated lab, a specific report format, a restricted substances list, or chemical limits stricter than legal minimums, send that requirement before sample approval and include it in the quotation basis.

Also confirm who pays testing fees and what happens if a product fails. If failure comes from factory substitution, incorrect lens use, or an unapproved material change, the factory should pay correction and retesting. If the buyer requested a risky construction, changed material after approval, added a new market, or required extra retailer testing not included in the quotation, agree on cost and schedule impact before production continues.

Lock Price, MOQ, and Reorder Protection

Price should be tied to volume, material, construction, decoration, packaging, compliance documents, and delivery terms. A verbal unit price is not complete until the quotation states what is included. A basic injection frame with standard lenses and a simple pouch is not comparable to an acetate frame with polarized lenses, metal logo plates, mirror coating, a custom hard case, retail box, and third-party testing.

MOQ should be defined by SKU, color, lens type, and packaging version. Some suppliers may accept small trial quantities for market testing. Better unit costs usually require larger runs because material purchasing, color setup, mold changeover, lens tinting, logo setup, line balancing, inspection labor, and carton handling are spread over more units. The agreement should state whether the MOQ applies per design, per color, per lens option, per logo, or per shipment.

The contract should state the exact price basis: EXW, FOB, CIF, or another Incoterm; included packaging; included spare parts; included compliance documents; currency; bank charges; tax treatment if relevant; and price validity. If the price includes a microfiber pouch but not a hard case, write it. If metal logo plates, polarized lenses, mirror coatings, retail boxes, barcode labels, or lab testing are extra, write it. Small omissions become margin leaks.

Reorder protection matters. A good first run is not enough if the second run changes color, lens shade, hinge feel, or packaging paper. Require the factory to keep the approved sample, material references, lens tint reference, artwork, mold or CNC settings where applicable, packaging dielines, barcode files, and QC records for future orders. For private label sunglasses, confirm that your logo artwork, custom packaging files, and exclusive molds will not be used for other customers.

Set Lead Time and Late Delivery Rules

Lead time should start from a clear event, not from casual discussion. For OEM sunglasses, count bulk production from receipt of deposit, final artwork, approved sample, confirmed packaging, confirmed compliance requirement, and any required tooling or material approval. If one of those is missing, the clock should not start.

The supplier should provide a written schedule for sampling, material purchasing, production, in-process checks, packing, final inspection, and shipment handover. More complex projects may need longer: new molds, custom acetate colors, polarized lenses, mirror coatings, metal trims, multiple logo positions, special retail packaging, or several SKUs packed by color ratio. Orders near Chinese New Year, National Day, or peak sunglasses season also need earlier booking because factory capacity, component suppliers, and logistics capacity may be tight.

The agreement should include a delivery window, not only a target date. Example: goods ready for final inspection between May 10 and May 15. Then define what happens if the factory misses that window for reasons under its control. Common remedies include air freight cost sharing, a defined discount per delayed week, priority production for affected SKUs, or cancellation rights after a defined delay. Keep penalties realistic and written into the signed agreement. If the penalty is extreme or unclear, it is less likely to be accepted or applied in practice.

Also define buyer-caused delays. Late artwork, late deposit, late sample approval, changed carton marks, delayed inspection booking, late barcode confirmation, or new compliance requirements should extend the delivery date. This protects both sides and reduces arguments when the shipment schedule gets tight.

Write Rework, Claims, and Exit Rules

Defects can happen even with a clear specification. The agreement should state how they are reported, verified, and corrected. Require clear evidence: order number, SKU, quantity affected, photos, videos if needed, carton numbers, inspection report, and timing. For visible defects, claims should be made within a fixed period after receipt, such as 7-15 days. For compliance failures or hidden functional defects, a longer claim period may be appropriate and should be stated in the agreement.

Correction options should be ranked. First, sort and rework if the issue can be fixed safely without damaging the product or violating compliance requirements. Second, replace defective units in the next shipment. Third, credit the buyer if replacement is not practical. Remake the full order only when the defect affects the full lot and cannot be sorted or reworked. That is less common, but the agreement should still cover it.

Payment terms should support this structure. For new buyer-supplier relationships, deposit and balance before shipment is common. If final inspection is required, connect balance payment to inspection pass and agreed shipping documents. For repeat buyers with stable history, different terms can be negotiated, but payment terms should not cover up unclear QC rules.

A good OEM agreement does not make production perfect. It makes the answer obvious when production is not perfect.

Finally, include exit rules. If production is canceled after resin, acetate, lenses, metal trims, or packaging are purchased, who owns the material? If custom packaging is printed, can it be stored for a reorder, and for how long? If a mold is inactive for a long period, does storage continue, does a maintenance fee apply, or can the factory dispose of it after notice? These clauses feel administrative until a program stops. Then they prevent avoidable cost and disagreement.

Why source this from Wenzhou with LumiShades

Wenzhou in Zhejiang Province is widely regarded as China’s eyewear manufacturing capital, producing a large share of the world’s sunglasses. That concentration matters to buyers: a deep local supply chain for acetate sheet, hinges, lens blanks, plating and packaging means shorter component lead times, easier color and material matching, and a workforce with decades of eyewear-specific skill. LumiShades has manufactured in this ecosystem since 2009, and our vertical integration — in-house injection molding, acetate cutting, CNC milling, lens tinting, decoration and quality control — means no part of your order is quietly subcontracted to a workshop you cannot audit.

For international buyers, that vertical control translates into accountability. When a single factory owns every step, defects are traced and fixed at source rather than bounced between vendors, and your specifications survive intact from first sample to bulk. We back this with 15+ years of experience, shipments to 60+ countries, more than 5 million pairs produced per year and a 98.5% on-time delivery rate. Our certifications — CE EN ISO 12312-1, FDA registration, ANSI Z80.3, AS/NZS 1067, REACH, ISO 9001 and BSCI audit — mean the compliance documentation your market requires already exists. Explore our manufacturing capabilities and quality control process to see how this works in practice.

Frequently asked questions

Should the PO or the approved sample control if they conflict? State the order of authority in writing before production starts. A practical approach is: the approved gold sample and final spec sheet control appearance, dimensions, materials, lens details, logo placement, packaging construction, and workmanship; the PO controls quantity, price, Incoterm, payment, delivery window, and shipment terms. If there is any conflict, issue a written revision instead of relying on chat messages.

What MOQ should I use for a first OEM sunglasses order? Ask the supplier to quote MOQ by design, color, lens option, logo, and packaging version. For a first order, choose a quantity that supports your market test but still allows stable material purchasing and QC. If you need a very small trial run, confirm whether the unit price, setup charges, packaging cost, and inspection cost are different from a larger reorder.

Who should pay if final inspection fails? Write the cost rule into the agreement. If failure is caused by factory workmanship, wrong material, wrong lens, wrong packaging, incorrect assembly, or unapproved substitution, the factory should pay for sorting, rework, replacement, and re-inspection. If failure is caused by buyer artwork error, incorrect barcode files, late changes, or a wrong approved sample supplied by the buyer, the buyer usually pays the related correction cost.

Do I need new compliance testing for every reorder? Not always. Existing reports may be acceptable if the reorder uses the same frame material, lens material, tint family, coating, supplier process, age category, and target market. Trigger a compliance review when you change lens color, mirror coating, polarization, frame material, supplier, child/adult classification, product claim, packaging label, or destination market.

How can I protect reorders from color and fit changes? Keep a signed gold sample and require the factory to retain matching production references: material notes, color reference, lens tint reference, tolerances, mold or CNC settings where applicable, hinge and screw specifications, artwork, packaging dielines, barcode files, and QC records. Add a clause requiring the factory to disclose and obtain approval for any material, component, coating, tooling, or process change before each repeat PO.

What delivery penalty is realistic for OEM sunglasses? Use remedies that are practical and tied only to factory-caused delay. Options include partial air freight cost sharing, a defined discount per delayed week, priority production for affected SKUs, or cancellation rights after a set delay. Also state that buyer-caused delays, such as late deposit, late artwork, late sample approval, changed packaging files, or delayed inspection booking, extend the delivery window.