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How Long Does It Take to Manufacture Sunglasses?
Complete Lead Time Guide for Brands and Buyers
If you’re planning to develop a sunglasses collection, one of the first questions you’ll ask is: How long does it take to manufacture sunglasses?
The answer depends on several factors—including design complexity, material selection, production volume, and finishing requirements.
In this guide, we break down the typical injection sunglasses production timeline, explain each stage, and help you understand what affects lead time in real manufacturing conditions.
Typical Sunglasses Production Lead Time
For most custom injection sunglasses projects, the standard lead time is:
👉 50–60 days for mass production
This timeline ensures:
- Stable product quality
- Consistent finishing
- Reliable large-scale production
⚠️ Shorter timelines may be possible—but often involve trade-offs in quality or process control.
Sunglasses Manufacturing Timeline Breakdown
👉 This workflow covers PC, TR90, CP, and similar injection materials. As you can see, production is not a single step—it is a systematic process with multiple stages and quality checkpoints.
1. Material Preparation & Pre-Treatment (3–5 days)
- Incoming injection materials (PC, TR90, etc.)
- Pre-injection drying treatment
👉 Why it takes time:
Moisture must be fully removed to prevent defects like bubbles and deformation.
2. Injection Molding & Initial Processing (5–7 days)
- Injection molding
- Leftover clearing
- Initial shaping
👉 Key point:
Injection cycles and cooling time cannot be rushed without affecting product stability.
3. Tumbling & Polishing (8–10 days)
- Tumbling (vibration polishing)
- Surface smoothing
- Edge refinement
👉 This stage defines:
- Surface quality
- Touch and feel
- Product consistency
⚠️ Shortcuts here = cheap-looking products
4. Hinge Processing & Surface Finishing (8–10 days)
- Hinge pressing and cleaning
- Painting & lacquering
- Temple printing (logo)
👉 Requires:
- Layer-by-layer coating
- Controlled drying time
- Dust-free environment
5. Lens Processing & Metal Component Preparation (5–7 days)
- Lens cutting (PC, TAC, nylon, etc.)
- Metal parts processing (welding, plating)
👉 These processes run partially in parallel but still require coordination.
6. Assembly & Fitting Adjustment (5–7 days)
- Screwing & assembling
- Frame alignment
- Wearing comfort adjustment
👉 Precision here ensures:
- Fit consistency
- Structural durability
7. Quality Control & Rework Cycle (6–8 days)
- Final quality inspection
- Functional and visual checks
If defects are found:
👉 Products go into repair / rework loop
This step is critical and often underestimated.
8. Cleaning, Packing & Delivery (4–6 days)
- Final cleaning
- Packaging
- Shipment preparation
👉 Only after QC pass → delivery
Total Production Time
👉 Adding all stages together:
Standard production lead time: 50–60 days
This is a realistic and quality-driven timeline, not an artificial delay.
Why Some Suppliers Offer Faster Lead Times
Some factories may quote 30–40 days, but this often means:
- Skipping proper drying
- Reducing polishing time
- Simplifying finishing processes
- Limiting quality inspection
- Avoiding rework cycles
👉 Result:
- Inconsistent quality
- Higher defect rates
- Shorter product lifespan
The Key Difference: Process Control vs Speed
The difference is not just time—it’s how seriously each step is treated.
At Viff Eyewear, we follow a complete process because we believe:
👉 Every step you skip today becomes a problem after delivery
Not Sure About Your Production Timeline?
Every project is different depending on:
- Design complexity
- Material selection
- Order quantity
- Quality requirements
👉 Our team can help you:
- Estimate realistic timelines
- Optimize production planning
- Balance speed and quality
Work with a Reliable Eyewear Manufacturer
At Viff Eyewear, we provide:
- Full OEM & ODM support
- Injection (PC, TR90) and acetate production
- Transparent production scheduling
- Strict multi-stage quality control
👉 We don’t just manufacture products—we ensure consistency, reliability, and brand-level quality
👉 Start Your Project Today
- Share your design
- Get lead time estimation
- Receive production plan
👉 Contact us now to get started
Contact Us
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