Pre-Production Sunglasses Sample Inspection Checklist

Before approving a pre-production sunglasses sample, compare it carefully with the approved artwork, specifications, and reference sample. For the Custom Logo 2026 Fashion Retro Irregular Gradient Lens Shades UV400 Rimless Square Sunglasses for Men Women, inspection should cover appearance, construction, lens performance, comfort, packaging, and product identification.

Pre-Production Sample Approval Priorities

A sample is ready for approval only when the custom logo, rimless square frame, gradient lenses, UV400 marking, mechanical function, and packaging meet the agreed requirements. Any variation should be documented with its location, severity, and required correction before bulk manufacturing begins.

Logo and Visual Presentation

Compare the logo with the approved digital file or master sample. Confirm the spelling, artwork proportions, position, dimensions, color, sharpness, and consistency across all applicable surfaces. The logo should be firmly applied and should not show smearing, peeling, distortion, uneven edges, or visible damage after normal handling.

Frame Structure and Dimensions

Inspect the irregular retro styling and square rimless construction from multiple angles. Check left-to-right symmetry, lens alignment, bridge position, temple alignment, overall dimensions, edge finishing, and surface quality. The lens mounting must be secure, with no cracks, excessive looseness, sharp edges, or unfinished areas.

Lens Quality and UV400 Verification

Evaluate the gradient transition on both lenses and compare the shade with the approved color reference under consistent lighting. Check for matching color, uniform transparency, optical clarity, scratches, bubbles, spots, ripples, and visual distortion. Confirm that the UV400 marking is present, legible, and correctly positioned.

Function, Fit, and Wearing Comfort

Open and close each temple several times to assess hinge resistance and smooth movement. Verify that the frame remains stable, the lenses stay securely seated, and the temples align correctly when folded and extended. Wear the sample to check nose and ear contact, balance, pressure points, and general comfort for both men and women. Note any instability, cracking, stiffness, or unusual movement.

Packaging and Product Information

Packaging should reflect the agreed product details and protect the sunglasses during handling and shipment. Check the product name, logo presentation, labels, quantity, protective materials, and included accessories. The listed minimum order quantity is 5 pieces. Delivery time and export-market specifications are not provided in the available product information, so these details should be confirmed separately.

Inspection Reference Table

Frequently Asked Questions

What logo details need to be checked on a sunglasses sample?

Verify the artwork, spelling, position, size, color, edge definition, adhesion, and resistance to ordinary handling. The sample should be compared directly with the approved logo file or reference piece.

How can gradient lenses be approved?

Confirm that both lenses have a consistent gradient and match the approved color standard. They should remain clear and free from scratches, bubbles, spots, distortion, and other visible defects. The UV400 marking must also be accurate and readable.

What mechanical tests should be completed?

Test repeated hinge opening and closing, temple alignment, lens retention, rimless mounting strength, frame symmetry, and wearing comfort. Record loose hinges, cracks, sharp edges, or movement problems so the factory can correct them in the next sample.

Final Approval Guidance

Do not release the sample for mass production until all visual, structural, optical, functional, comfort, packaging, and identification requirements have been checked. Yiwu Green Shine Arts & Crafts Co., Ltd. provides OEM and ODM eyewear services, with a stated annual production capacity of more than 3 million pairs of sunglasses. For technical support or customized solutions, contact leoxiao@cngreenshine.com.

About Us

Yiwu Green Shine Arts & Crafts Co., Ltd. was founded in 2016 in Yiwu, Zhejiang Province. The company specializes in fashion eyewear, including sunglasses, optical frames, acetate sunglasses, children sunglasses, and reading glasses. Its 10-person team operates in a 130 square meter factory and supports 3D modeling, rapid prototyping, structural optimization, sample trial production, mold customization, and OEM or ODM development.