1.56 hc lens price

When sourcing 1.56 index lenses, the Abbe Value (typically around 38) is critical as it determines the level of chromatic aberration. You must verify the Hard Coating (HC) thickness and uniformity, which ensures the lens is scratch-resistant. Additionally, check the luminous transmittance, which should be above 98% for clear vision, and ensure the diopter tolerance strictly adheres to ISO 8980-1 standards.

The HC treatment significantly increases the surface hardness (measured by the Bayer Test), making the lenses durable enough for daily wear. For B2B buyers, choosing HC lenses over uncoated ones reduces return rates due to surface damage. While the unit price is slightly higher than uncoated blanks, the value-to-cost ratio is superior because it extends the product's shelf life and consumer satisfaction.

For the US market, lenses must pass the FDA 21 CFR 801.410 'Drop Ball Test' to ensure impact resistance. For the European market, CE Marking and compliance with EN ISO 14889 are mandatory. Buyers should request Declaration of Conformity (DoC) and test reports from accredited third-party labs to avoid customs seizures.

1.56 index lenses, often referred to as 'Middle Index', are ideal for prescriptions ranging from -3.00 to +3.00 diopters. They are the 'workhorse' of the optical industry, providing a balance between thinness and affordability. They are most commonly used in standard full-rim frames for students and office workers who require a cost-effective yet reliable vision solution.

Resin lenses can yellow over time if stored improperly. Ensure your contract specifies a 'Production Date' within the last 6 months. Request that the supplier uses UV-protective vacuum packaging and check for optical clarity during the pre-shipment inspection to ensure no oxidation has occurred.

Focus on the 'Yield Rate' and 'Defect Rate' rather than just the unit price. Negotiate a replacement clause for defects exceeding 1-2%. For orders over 10,000 pairs, aim for a volume discount of 10-15%, and leverage Made-in-China.com's Diamond Members who often provide better price stability for long-term contracts.

Lenses are sensitive to pressure and temperature fluctuations. Insist on double-walled corrugated export cartons and internal shock-absorbing dividers. For sea freight, ensure the use of desiccants (silica gel) inside the master cartons to prevent moisture from affecting the lens coatings during transit through humid tropical zones.

Always use Secured Trading Services provided by reputable platforms like Made-in-China.com. Never wire full payments upfront to unverified accounts; instead, use a 30% deposit and 70% balance payment structure against the Bill of Lading (B/L) after a successful third-party quality inspection.