Uv 400 ce sunglasses

The most vital specification is UV400 protection, which ensures the lenses block 99% to 100% of UVA and UVB rays with wavelengths up to 400 nanometers. Additionally, buyers should verify the lens material (e.g., Polycarbonate for impact resistance or TAC for polarization) and frame durability (e.g., TR90 memory plastic or 316L stainless steel). For optical clarity, ensure the lenses meet Class 1 optical standards to prevent distortion and eye fatigue.

For the European Union, products must bear the CE Mark, signifying compliance with EN ISO 12312-1:2013/A1:2015. For the United States, sunglasses are regulated as Class I medical devices by the FDA, requiring 21 CFR 801.410 (Impact Resistance/Drop Ball Test) compliance. Failure to provide these certifications can lead to customs seizures and legal liability.

Buyers should request a UV spectrophotometer test report from the supplier to confirm the UV400 rating. To verify polarization, a Polarized Test Card or a digital lens meter should be used. For bulk orders, it is highly recommended to hire a third-party inspection agency (like SGS or Intertek) to perform a Drop Ball Test to ensure the lenses do not shatter under impact.

Currently, Eco-friendly materials such as recycled acetate or bio-based plastics are highly marketable and offer a competitive edge. From a cost-efficiency perspective, TR90 frames provide the best balance of lightweight comfort, durability, and low production cost, making them ideal for high-volume retail.

The primary risks include non-compliant certification (fake CE/FDA documents) and material substitution, where a supplier uses cheaper acrylic lenses instead of promised polycarbonate. To mitigate this, always source from Audited Suppliers on Made-in-China.com and request factory video audits to confirm their production capabilities and quality control labs.

For OEM/ODM orders, typical MOQs range from 300 to 1,200 pieces per style. Negotiate for a tiered pricing structure where the unit price drops by 10-20% as volume increases. If you are a startup, look for suppliers offering 'Ready to Ship' items with low MOQs (e.g., 12-50 pieces) that allow for custom logo printing (silk screen or laser engraving) on existing stock.

Always use Secured Payment services provided by reputable B2B platforms like Made-in-China.com to ensure funds are only released upon proof of shipment. Utilize Letter of Credit (L/C) for very large transactions or a 30% deposit / 70% balance payment structure after a successful pre-shipment inspection (PSI).

Sunglasses are lightweight but fragile. For small to medium batches, Air Express (DHL/FedEx) is preferred for speed and lower risk of crushing. For large bulk orders, Sea Freight (LCL) is most economical. Ensure the supplier uses double-corrugated export cartons and that each pair is protected by a polybag and individual inner box to prevent scratches during transit.