Kingway organizes high-index lenses by material, not just index

Zhenjiang Kingway Optical says it sorts single-vision and photochromic high-index lenses by material substrate to help buyers specify the right lens configuration. The approach is meant to reduce RFQ errors and match prescription, frame, coating and photochromic requirements more precisely.

Why it matters: - Kingway’s material-led catalog is designed to help wholesalers, optical chains and labs avoid mismatches between refractive index and the actual lens substrate. - The company says clearer RFQs can reduce laboratory processing errors, improve order accuracy and support global distribution. - Buyers sourcing high-index lenses need both thinness and material performance to align with prescription and frame requirements.

What happened: - Zhenjiang Kingway Optical Co., Ltd., established in 2011, outlined a sourcing structure that separates single-vision and photochromic lenses by material rather than by index alone. - The company highlighted three single-vision routes: 1.61 MR8, 1.67 MR7 and 1.74 MR-174. - Kingway also said its photochromic range includes 1.61 and 1.67 Spin Photogray products. - The company directs buyers to submit complete high-index specifications through its website for product matching and OEM quotation. - Kingway also maintains a LinkedIn page for the company.

The details: - Kingway says the 1.61 route uses MR8 polymer and is positioned for a balance of refractive efficiency, specific gravity and Abbe number. - The company says 1.61 MR8 is suited to rimless and semi-rimless frames because of its toughness and resistance to cracking during edging. - Kingway says the 1.67 route combines MR-7 material with aspheric geometry and AR or HMC coating. - The company says 1.67 MR7 offers a thinner edge than MR8 while keeping processing stable for more demanding lab work. - Kingway says the 1.74 route uses MR-174 material, an aspheric design and a super-hydrophobic coating. - The company says 1.74 MR-174 is its highest-index route in the three material-specific single-vision options and is intended for very high prescriptions. - Kingway says its photochromic lenses add light-responsive spin-coating technology on top of the base high-index substrate. - The company says it manufactures finished, semi-finished, photochromic, progressive, bifocal and prescription lenses for global markets. - Kingway says a complete RFQ should include prescription details, frame or diameter constraints, index and material route, spherical or aspheric geometry, coating needs, photochromic requirements, order quantity and packaging preferences.

Between the lines: - The company is drawing a sharp distinction between optical index, material density and final lens weight. - Kingway says a thinner lens is not automatically a lighter lens because finished weight also depends on specific gravity and lens geometry. - The sourcing structure appears aimed at helping B2B buyers compare similar-sounding products without conflating clear, photochromic and coated versions. - Kingway’s framing suggests it wants procurement teams to treat material, prescription and coating as a single technical brief rather than a one-line product request.

What's next: - Kingway is encouraging buyers to submit full specifications for quotation and OEM packaging discussions. - The company’s catalog approach points to continued emphasis on segmented high-index product selection for wholesale customers. - Optical buyers are likely to keep comparing MR8, MR7 and MR-174 routes based on thickness, processing characteristics and end-use frame compatibility.

The bottom line: - Kingway’s message is simple: in high-index lenses, the index number matters, but the material, coating and frame requirements determine whether the finished product actually fits the job.