Sunglasses Tech Pack Checklist for Bulk Production

This guide is for brand owners, importers, distributors, and retailers buying custom sunglasses at volume. A weak tech pack creates predictable problems: vague quotes, off-spec samples, branding mistakes, and lost time in sampling or pre-production. A solid pack gives the factory measurable targets for frame geometry, materials, lenses, hardware, decoration, testing, and commercial limits. That is the point. A supplier can quote, sample, and schedule accurately only when the product is defined in production terms, not just by appearance.

Start with drawings, not a mood board

The first job of a sunglasses tech pack is to remove guesswork. A factory can work from a hand sketch, CAD file, or marked-up reference sample, but the geometry still has to be defined in production terms. Mood boards, runway images, and competitor screenshots can show style direction. They cannot tell a sample room what dimensions to build, how much wrap to engineer into the front, or where a logo sits.

At minimum, include a front view, side view, and top or sectional view if the frame has wrap, bevel detail, or unusual thickness transitions. Use millimeters throughout. Call out lens width, bridge width, temple length, front width, lens height, DBL, base curve if known, and any material thicknesses that affect fit, assembly, or appearance. If you are modifying an existing frame, mark the changes directly against that reference: front width +2.0 mm, bridge opening +0.8 mm, lens top line flattened 1.5 mm, or temple tip angle reduced by 3 degrees.

Separate fit-critical dimensions from cosmetic ones. Front width, bridge opening, pantoscopic angle, temple spread, and lens seating are functional. Logo position, temple taper, and polish level are cosmetic, but they still need measurable callouts. Without them, sample review turns subjective and the approval standard keeps moving.

• Use millimeters only. Do not mix mm and inches.
• Note tolerances on critical points. Agree them with the supplier based on material, process, and measurement point.
• Mark left and right temple decoration separately if the artwork, orientation, or process differs.
• Label inspiration photos as visual reference only so they are not mistaken for production dimensions.
• If sending a physical sample, identify what must be copied exactly and what may change.

If the factory has to interpret the style and engineer the product at the same time, sampling slows down. Feedback gets harder to control too.

Lock the frame material and process route

Writing only plastic frame is not enough. Material and process route affect tooling, finish, weight, detail resolution, decoration compatibility, and lead time. An injection-molded frame does not behave like a frame cut and polished from acetate sheet, even if both look similar on screen.

Your pack should state the material, process, target finish, target weight if relevant, and any non-negotiable performance point. Examples: shiny black injected polycarbonate frame; TR90 sport frame with flexibility required at the hinge zone; acetate front with visible wire core in the temples; matte rubberized finish with low tack after packing simulation.

If the supplier is making the sample, ask them to confirm the actual route used. That matters. A hand-built prototype may be fine for design review, but it may not reflect the dimensional stability, radius transitions, or surface finish of bulk production. You need to know what you are approving.

This is also the point to check supplier capability. If the program requires documented quality systems or social compliance, confirm that the supplier can provide the required records before sampling goes too far. Common factory-level credentials include ISO 9001 for quality management and BSCI for social compliance. Useful, yes. But they do not replace product testing.

Write a lens spec that can be made and tested

Loose lens instructions cause a disproportionate number of delays. Buyers often write UV400 smoke lens and assume the factory will fill in the rest. That leaves open questions about lens material, construction, filter category or visible light transmission, coating, polarization, mirror treatment, and the standard the product must meet.

A workable lens specification starts with material. For commercial sunglasses, that is often polycarbonate, TAC polarized construction, nylon, or CR-39 depending on the product position. Then define the function: standard tint, polarized, mirror, gradient, flash mirror, or photochromic. If you know the target visible light transmission or filter category, state it. If not, state the intended market and use case so the supplier can propose a suitable construction for review.

Color needs more control than a word like smoke or brown. The cleanest method is an approved control sample. If you do not have one, provide a visual reference and state whether final approval will be visual against that reference or lab-based against a defined requirement. If the lens is polarized, specify the construction and ask the supplier to confirm polarization in the sample submission.

• Lens material: polycarbonate, TAC polarized, nylon, CR-39, or other specified material
• Lens function: tint, polarized, mirror, gradient, flash mirror, photochromic
• Visible light transmission target or filter category if known
• Hard-coat or scratch-resistance requirement if needed
• Base curve and thickness if critical to assembly or optics
• Applicable requirement: CE EN ISO 12312-1, ANSI Z80.3, AS/NZS 1067, REACH where relevant

Write compliance into the pack before sampling starts. If the product is for a regulated market, the supplier needs to know whether the sample is only a visual prototype, an internal pre-check sample, or part of the intended compliance path. FDA registration may matter for importer or facility documentation in some programs, but it is not proof that the sunglasses meet CE EN ISO 12312-1, ANSI Z80.3, or AS/NZS 1067. Keep those issues separate.

Call out hardware like QC will inspect it

Hinges, screws, wire cores, nose pads, and decorative trims are small parts. They still drive many fit, durability, and appearance problems. Treat them as controlled components, not details to settle later.

Start with the hinge. Specify hinge type, visible finish, screw color if visible, and whether spring hinges are required, allowed, or prohibited. If you are using a standard barrel hinge, note the leaf count if appearance or construction consistency matters. If you are using spring hinges, define the expected closed position and any functional requirement that can be checked during sample review.

For wire-core temples, state whether any read-through is acceptable after polishing. For nose pads, specify pad material, arm finish, and attachment style. For metal trims or logo plates, the drawing should show dimensions, corner radius, finish tone, and attachment method. A note such as gold logo on temple is too vague. It could mean a glued plate, an inset plate, a stamped foil, a laser mark with paint fill, or a metallic pad print. Those options have different durability and process risks.

Where possible, include an acceptance standard a QC team can actually inspect. Examples: hinge opens and closes smoothly without binding; no sharp edge on exposed metal trim; no visible glue overflow under defined inspection conditions; left and right temples close evenly; decorative parts sit flush without rocking or visible gap. That gives the buyer and supplier the same review standard.

Make decoration specs measurable

Branding errors are expensive. They are visible, and many are hard to rework cleanly. The tech pack should include artwork files, process selection, placement dimensions, finish expectations, and reject criteria for each decoration point. The easiest way to manage this is with a decoration schedule.

Assign each branding location a code, then specify side, process, size, orientation, color, finish, and measurement reference. Example: LT-01, left temple outer, pad print, 18.0 x 3.5 mm, centered vertically, 12.0 mm from hinge centerline, black, matte finish. For laser engraving, specify whether the result should be tonal, engraved for depth, or paint-filled. For metal plates, specify plating tone, recess depth if inlaid, and whether any protective film stays in place through packing.

Decoration methods behave differently in production. Pad printing is efficient, but registration and adhesion depend on the substrate and surface finish. Laser engraving is durable on suitable materials, but the visual result differs across acetate, injected plastic, and coated metal. Glued metal logos can raise perceived value, but they add an assembly step and create visible glue risk if the recess and part fit are not tightly controlled.

1. Attach vector artwork in the required file format.
2. Assign each decoration point a code.
3. Measure each location from a fixed production reference such as hinge centerline or temple tip end.
4. State process, color, size, finish, and acceptable variance.
5. Define rejectable defects such as print shift, color mismatch, scratches, excess glue, or incomplete paint fill.

The exact allowable variance should be agreed with the supplier based on the decoration process and product level. What matters is clarity. Sample review and QC should not depend on personal interpretation.

Set the testing and approval path before sampling

A sample is not only for checking appearance. It is the point where you decide whether the design, construction, and compliance path are acceptable for the target market. Your tech pack should state what the supplier must verify at sample stage, what will be reviewed again at pre-production, and what requires third-party testing.

At minimum, request dimensional verification against the drawing, hinge function review, lens color and construction confirmation, assembly review, decoration review, and visual QC under defined lighting conditions. If the product is intended for regulated markets, state the target requirement in writing before the first sample is made: CE EN ISO 12312-1, ANSI Z80.3, AS/NZS 1067, and REACH where relevant to materials or chemical restrictions.

Then define the testing sequence. In many programs, the first sample is for construction and appearance review only, and formal compliance testing happens after design approval or at pre-production stage. That is normal. It should still be explicit. If you need earlier testing because the lens construction is unusual or the launch risk is high, write that into the pack so the supplier can plan cost and lead time correctly.

Put the testing sequence in writing before the first sample is made. Otherwise you may approve a look that later fails the target market requirement.

A simple note can remove confusion: internal pre-check report at sample stage; third-party compliance test after approved sample; shipment release dependent on passing report. If the program also requires supplier documents such as FDA registration, ISO 9001, or BSCI records, list those separately so they are not confused with product-performance evidence.

Add the commercial details that change the build

A tech pack also needs a short commercial section. Cost target, MOQ, and timing affect what is realistic to make. Some constructions work only at higher volumes. Some decoration choices make sense for a premium retail position but not for an entry-level program.

State the target quantity by color, target price basis if known, packaging requirement, barcode or sticker needs, carton packing rules, and any launch-critical milestone. Also identify whether the sample is for line review, sales use, photography, internal testing, or final approval. Those uses can require different finish levels or documentation.

MOQ logic should be explicit. A supplier may support a low-MOQ development run, but unit economics, color matching, and process choice can change sharply at different order quantities. The pack should therefore state not only the desired MOQ, but also which elements are fixed and which can be simplified if the order stays small.

Document schedule expectations in practical terms: requested sample date, feedback deadline, pre-production approval date, and ship window. If the launch is date-critical, note what can flex and what cannot. Examples include whether split shipment is acceptable, whether retail packaging must be in the first shipment, whether barcode labels must be applied at the factory, and whether lens color can be adjusted only with written approval.

Use a one-page check before you send it

Many sampling delays start with fragmented information: sketch first, logo file later, lens note later, packaging revision later. Every late addition creates more questions. Some force the supplier to rebuild the sample or re-quote the project.

A one-page internal checklist helps prevent that. Before sending the pack to the factory, confirm that the technical, compliance, and commercial inputs are complete enough for the supplier to quote, sample, and plan production properly. Even when some values are provisional, label them clearly so the supplier knows what is fixed and what is still pending.

• All dimensions shown in millimeters and tied to a clear drawing view
• Frame material and process route confirmed
• Lens material, color, function, and compliance target stated
• Hinge type, metal parts, trims, and visible hardware specified
• Artwork files attached and decoration schedule complete
• Testing expectations and approval sequence written clearly
• Packaging, labeling, barcode, and carton requirements included
• Target quantity, MOQ plan, target price logic, and timeline included

A complete pack does not guarantee first-pass approval. It does make the first sample more useful because the supplier is working against defined requirements instead of assumptions. That usually shortens clarification cycles and improves sample quality.

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

Can I start sampling with only a reference sample and no drawing? Yes, but only if you mark the reference sample clearly enough for the supplier to separate what is fixed from what is changing. At minimum, provide a dimension sheet, material notes, lens requirements, hardware notes, and decoration positions. If possible, include photos of the sample with callouts and a simple table listing each requested change. Without that, the supplier has to infer design intent, and the sample may come back visually close but technically wrong.

What tolerance should I put on frame dimensions? Do not apply one blanket tolerance to every dimension. Identify which points are fit-critical, assembly-critical, or cosmetic, then ask the supplier to confirm achievable tolerances by material and process. Bridge opening, lens seating, hinge alignment, and temple symmetry usually need tighter control than logo placement or non-functional edge transitions. The practical step is to mark each critical dimension on the drawing and request a tolerance proposal on the sample approval sheet so both sides are working to the same standard.

Should compliance testing happen before or after sample approval? Usually the first sample is used to confirm design intent, fit, and construction, while formal third-party testing happens after sample approval or at pre-production stage. If you are entering a regulated market, using an unusual lens construction, or working to a fixed launch date, decide the testing sequence before sampling starts. State in the tech pack whether the first sample is visual only, for internal pre-check, or intended to follow the final compliance route under CE EN ISO 12312-1, ANSI Z80.3, or AS/NZS 1067. That lets the supplier budget time and cost correctly.

How detailed does logo artwork placement need to be? Detailed enough that a QC inspector can measure it without guessing. Provide the artwork file, decoration process, exact size, orientation, color reference, finish, and the distance from a fixed point such as hinge centerline, lens edge, or temple end. Also define what counts as a reject, such as print shift, poor adhesion, excess glue, plating defect, or incomplete paint fill. If the same logo appears in multiple places, specify each location separately rather than assuming the factory will scale or position it consistently by eye.

Does FDA registration mean the sunglasses already meet performance standards? No. FDA registration is an administrative or facility-related requirement in some programs. It is not proof that the sunglasses meet market performance requirements. Product compliance still needs to be specified separately in the tech pack, including the target standard, test stage, and required evidence. If you are buying for markets that rely on CE EN ISO 12312-1, ANSI Z80.3, or AS/NZS 1067, ask the supplier what test reports will be provided, at what stage, and whether the tested sample will match the final production construction.