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Designer & Prototype Development Partner

Bring Your Eyewear Designs From Sketches to Production

You already know what it should look like. Our engineering team handles the part that turns a sketch into a frame that actually holds its shape, opens correctly, and can be produced consistently at scale.

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The Gap Between "I Have a Design" and "It's Manufacturable"

A sketch or a rendering captures intent, but it doesn't answer the practical questions — will this hinge geometry actually hold up, is this temple too thin to survive shipping, does this curve translate to a mold. That gap is where most designer-led eyewear projects stall. We work on the other side of that gap: taking a design direction and engineering it into a frame that can actually be built.

No Complete Tech Pack? That's Normal

What You Can Actually Start With

Most designer projects don't begin with a finished spec sheet — they begin with one of these.

Concept Stage

Hand Sketches or Mood Boards

Rough drawings, silhouette references, or a mood board that captures the direction — engineering can work from intent, not just finished drawings.

Digital

Partial or Incomplete CAD

A 2D/3D file that's stalled on a specific detail — a hinge that doesn't resolve, a curve that won't translate — is a normal starting point, not a dealbreaker.

Physical

A Reference Frame to Reverse-Engineer

A vintage piece, a prototype from another maker, or a physical model you've built by hand — we can build the 2D/3D file from the object itself.

Design Development Process

From Sketch to Production, Step by Step

You bring the design direction — sketches, renderings, or a reference frame you want re-engineered. Here's how it moves forward from there.

1

Sketch

Hand drawings, digital renders, or a reference piece — whatever form your design direction is currently in.

2

2D/3D

Engineering translates the sketch into precise 3D CAD — dimensions, curves, thickness, hinge geometry.

3

Prototype

A physical prototype built to test fit, function, and whether the design holds up outside the render.

4

Modification

Adjustments based on what the prototype reveals — structure, weight, fit — before anything is locked.

5

Production

The refined design moves into tooling and manufacturing, built to match the approved prototype exactly.

Engineering Support

Where We Add What a Design Alone Can't

This is the part that separates a manufacturing partner from a factory that just executes a spec sheet.

Structural

Adjust Thickness

Finding the point where a frame reads as slim and intentional without becoming fragile in the areas that take the most stress — temples, hinge recesses, bridge.

Structural

Improve Structure

Reinforcing or reshaping load-bearing areas of a design so it survives daily wear and shipping, without changing the silhouette you designed.

Mechanism

Solve Hinge Problems

Working through hinge geometry, tension, and placement when a design's proportions don't match a standard hinge — a common snag in more sculptural or minimal shapes.

Comfort

Optimize Weight

Balancing material choice and frame geometry so a bold silhouette doesn't translate into a frame that's uncomfortable to wear for a full day.

Engineering in Action

A Few Builds Where Engineering Made the Difference

Not every design needs this level of problem-solving — but when it does, this is the kind of work our engineering team handles. Simpler designs get the same attention, just fewer steps.

Rimless with Engraved Edge Lenses

Lens-mounting systems that hold securely without a full frame, paired with a decoratively engraved lens edge that has to stay perfectly even all the way around. Precision drilling, hardware placement, and edge-cutting all have to align — there's no frame left to hide a mistake.

Faceted Acetate Geometry

Multi-angled, gem-cut style facets carved directly into thick acetate — each surface has to catch light consistently and stay symmetrical across every unit in the run, which is a very different challenge from a standard rounded edge.

Exposed Structural Metalwork

A layered, multi-piece metal build where the hardware and structure are part of the design, not hidden inside it — every screw, seam, and panel has to line up exactly, since there's nowhere for a misalignment to disappear.

Sharing an Unreleased Design?

Most designer projects come to us before anything is public — no press, no trademark filed yet. NDAs are standard practice here, not a special request, and your files stay internal to your project team. If you want the fuller picture on how mold ownership, exclusivity, and confidentiality typically work with a factory, our IP & confidentiality guide covers what's worth asking before you share anything.

Have a Design That Needs an Engineering Partner?

Send over your sketches, renderings, or reference pieces — we'll walk through what it takes to get from where the design is now to a manufacturable frame.

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Jenny Li · jenny@sailook.com · WhatsApp/WeChat +86 134 1076 7035 · Shenzhen, China