Pre-Production Sunglasses Sample Inspection Checklist

Before approving a pre-production sunglasses sample, review both its appearance and performance against the approved specifications. For the Custom Logo 2026 Fashion Retro Irregular Gradient Lens Shades UV400 Rimless Square Sunglasses for Men Women, special attention should be given to the logo, rimless frame structure, gradient lenses, UV400 marking, comfort, hinges, and packaging.

Pre-Production Sample Review Priorities

• Compare the custom logo with the approved artwork, including its position, dimensions, color, clarity, and durability.
• Measure the rimless square frame and inspect symmetry, lens alignment, bridge position, edge finishing, and overall surface quality.
• Evaluate gradient lens color, transition consistency, optical clarity, UV400 identification, and any visible defects.
• Test hinges, lens retention, wearing stability, comfort, accessories, labels, and packaging before issuing approval.

Inspection Process for the Sunglasses Sample

1. Confirm Product Identity and Design

Begin by checking that the sample corresponds to the approved product description: Custom Logo 2026 Fashion Retro Irregular Gradient Lens Shades UV400 Rimless Square Sunglasses for Men Women. The sample should accurately reflect the agreed retro styling, irregular details, square silhouette, rimless construction, gradient lenses, UV400 protection marking, and unisex positioning.

2. Examine the Custom Logo

Inspect every logo application for correct artwork, spelling, spacing, placement, dimensions, color, and edge definition. The logo should be sharp and evenly applied without stretching, smearing, peeling, or color variation. Rub the marked area under normal handling conditions to confirm that the finish remains secure. Any mismatch with the approved file or reference sample should be documented before mass production.

3. Check the Rimless Frame and Construction

Measure the key frame dimensions and compare the left and right sides for symmetry. Check whether the lenses sit evenly, the bridge is centered, and the temples align correctly. The rimless mounting points must hold the lenses firmly without cracks, movement, or stress marks. Also inspect the surface finish, edge treatment, and contact areas for roughness, sharp edges, scratches, or incomplete processing.

4. Evaluate Lens Appearance and Optical Quality

Review the gradient transition under consistent lighting and compare both lenses with the approved color reference. The shade should be even and repeatable from pair to pair, with clear visibility and no scratches, bubbles, cloudiness, distortion, or color contamination. Confirm that the UV400 marking is present, legible, and consistent with the agreed product requirements.

5. Test Function, Fit, and Comfort

Open and close the temples several times to assess hinge resistance, alignment, and smooth operation. Check that the frame remains stable, the lenses stay securely mounted, and the temples do not loosen during use. Wear the sample to evaluate pressure around the nose and ears, balance, temple contact, and general comfort. Record each problem by location and defect type so corrections can be checked efficiently on the next sample.

6. Verify Packaging and Commercial Information

Packaging should correspond with the agreed product details and protect the sunglasses during handling and transportation. Confirm the product name, logo presentation, quantity, labels, protective materials, and included accessories. The stated minimum order quantity is 5 pieces. Delivery timing and export-market requirements are not specified in the available product information and should be confirmed separately.

Inspection Criteria at a Glance

Frequently Asked Questions

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

Compare the sample with the approved logo file or physical reference. Verify the artwork, position, size, color, sharpness, adhesion, and resistance to ordinary rubbing and handling.

What is the best way to inspect gradient lenses?

Use consistent lighting to compare the gradient across both lenses and against the approved color reference. Check transparency and optical clarity, then look for scratches, bubbles, distortion, uneven transitions, and an accurate UV400 marking.

What frame and hinge checks should be completed?

Test temple opening and closing, hinge resistance, alignment, lens retention, rimless mounting strength, frame symmetry, and wearing comfort. Note any looseness, cracking, instability, rough edge, or uncomfortable contact point for correction.

Approval Recommendation

The pre-production sample should be released for bulk manufacturing only when the logo, rimless square frame, gradient lenses, UV400 marking, optical performance, hinges, fit, packaging, and product identification meet the approved requirements. Yiwu Green Shine Arts & Crafts Co., Ltd. provides OEM and ODM eyewear services and reports an annual production capacity of more than 3 million pairs of sunglasses. For technical assistance or product development support, contact leoxiao@cngreenshine.com.

About Yiwu Green Shine Arts & Crafts Co., Ltd.

Yiwu Green Shine Arts & Crafts Co., Ltd. was founded in 2016 in Yiwu, Zhejiang Province. The company manufactures fashion eyewear such as sunglasses, optical frames, acetate sunglasses, children's sunglasses, and reading glasses. With 10 employees and a 130 square meter factory, its development capabilities include 3D modeling, rapid prototyping, structural refinement, trial sample production, customized molds, and OEM and ODM design support.