CONVOX details how buyers can source clearer UV420 blue-block lenses

CONVOX outlines how optical buyers can reduce the yellow-tint problem in blue-block lenses by balancing substrate formulation, coating design, and visible-light transmission. The company also lists its UV420 lens lineup, production capacity, and B2B ordering requirements for distributors and private-label programs.

Why it matters: - Optical distributors, labs, and private-label brands need blue-block lenses that look clear enough to sell as premium products. - A yellow cast can affect color perception, cosmetic appeal, and product positioning. - Buyers sourcing UV420 lenses need to balance blue-violet filtering with visible-light transmission and neutral appearance.

What happened: - CONVOX published sourcing guidance on clearer UV420 blue-block optical lenses. - The company says its blue-block products are designed to manage selected blue-violet wavelengths around the 400–420nm range. - CONVOX says the final lens appearance depends on lens material, absorber formulation, coating structure, refractive index, and production consistency. - The company listed its corporate website as More information and provided sales contact at sales@convox.cn.

The details: - The article says many blue-cut lenses use absorptive compounds in the substrate to reduce selected wavelengths. - A lens can develop a warm or yellow cast if absorber concentration is not balanced with the base resin color. - High-index materials can make that effect more noticeable because each polymer has its own color and optical dispersion characteristics. - Clearer appearance depends on control of lens formulation, target filtering range, and residual reflection from anti-reflective coating. - CONVOX lists blue-block configurations in 1.56, 1.59 polycarbonate, 1.60, 1.67, 1.71, and 1.74. - The catalogue shows UV specifications vary by index and product configuration. - Several mid- and high-index options are offered with 400/420-class specifications. - Substrate-based blue-block designs integrate absorbing components into the resin before polymerization. - The formulation must be adjusted for each index so filtering performance, visible-light transmission, lens color, and mechanical properties stay balanced. - Multi-layer anti-reflective structures can help manage reflected wavelengths while improving visible-light transmission. - CONVOX’s 2026 catalogue says the factory operates 16 Korean NVC vacuum coating machines and two automatic production lines. - The same catalogue says broader resin-lens capacity reaches up to 50,000 pairs per day across multiple product categories. - The catalogue describes testing that includes anti-abrasion evaluation, edging checks, salt-water testing, and a five-procedure inspection process before shipment. - CONVOX lists finishing choices across its single-vision and blue-block protective lens series, including UC, hard coating, HMC, and SHMC configurations. - Additional functional options are available depending on product type, including anti-reflective coatings, hydrophobic top coats, anti-fog functions, photochromic options, and RX processing. - The company says a function available in 1.56 may not use the same material or coating construction in 1.67 or 1.74. - The final specification should be approved by sample before bulk production. - The CONVOX catalogue shows an RX department equipped for customized prescription production. - The company promotes fast RX processing for suitable orders. - Digital surfacing is used to optimize the back-surface prescription and thickness profile for customized blue-block lenses. - The same blue-block specification can be supplied in single vision, progressive, photochromic, and freeform formats for some programs.

Between the lines: - The sourcing guide frames lens color as a manufacturing-control issue, not just a marketing claim. - The emphasis on index-specific formulation suggests buyers need to evaluate each lens configuration separately. - The testing and production-capacity details are aimed at reassuring wholesale buyers that color consistency can be maintained at scale. - The article also signals that private-label and RX buyers should verify specifications before committing to volume orders.

What's next: - Buyers are urged to request sample sets, transmission data, coating specifications, OEM packaging proof, and remake terms before ordering. - CONVOX says customers can request current product specifications, sample lenses, coating options, and B2B pricing for stock, RX, progressive, photochromic, or private-label programs. - The company says selected combinations of blue-block, photochromic, and progressive features should be confirmed before purchase. - For wholesale programs, the final index, prescription range, coating, and functional configuration should be approved in advance.

The bottom line: - Clearer UV420 blue-block lenses depend on controlled materials, coatings, and production discipline, not just stronger filtering.