About Danyang Taixu Optical Co., Ltd. - Optical Lenses Supplier in China

Danyang Taixu Optical Co., Ltd. is based in China and currently lists five distinct optical lens products. The catalogue includes four variants of 1.56 photochromic lenses - progressive, round top, flat top, and single vision - and a Cr‑39 lens with a refractive index of 1.499. All items belong to the optical lens segment used for prescription eyewear. The product set reflects standard lens indices that balance weight and optical performance. No additional product families are listed.

The supplier’s entry follows the conventional naming conventions for lens types and indices, which align with HS‑code chapter 90 for optical instruments and lenses. The 1.56 index lenses are typically fabricated from high‑index plastic polymers, while the Cr‑39 lens is a standard cellulose‑triacetate material. The catalogue does not indicate any certifications, so buyers should verify compliance with relevant standards. The listing is classified as an imported tier with a harbor trust level. The five products represent the full range currently advertised.

Product Range and Specialties of Danyang Taixu Optical Co., Ltd.

The catalogue shows four 1.56 photochromic lenses - progressive, round top, flat top and single vision - plus a Cr‑39 1.499 lens. In the optical industry, 1.56 is a common high‑index plastic used for thin, lightweight frames, and photochromic treatment provides automatic UV‑driven darkening. Typical specifications include a visible light transmittance range of 30‑70 % after activation, UV‑A/B blocking above 95 %, and compliance with ISO 14729 for optical performance and safety. Buyers often request data on transition speed (seconds to reach full darkening) and colour stability over cycles.

The Cr‑39 lens, with a refractive index of 1.499, is a standard cellulose‑triacetate material valued for its high Abbe value (≈58) and low chromatic aberration. Industry grades usually meet the minimum optical clarity of 90 % transmission and are supplied in blank form for custom grinding. Standard tolerances for thickness and surface accuracy follow ISO 8980‑1, and many optical labs require a certified index and material data sheet before processing.

Trade and Export Information - Danyang Taixu Optical Co., Ltd.

China is a major exporter of optical lenses, supplying markets in North America, Europe and the Asia‑Pacific region. HS‑code 9001.20 covers prescription eyeglass lenses, and the listed 1.56 and 1.499 indices fall under this sub‑heading. Export shipments are typically packed in moisture‑controlled sealed bags or foam‑lined cardboard boxes to protect surface coatings, and loaded into 20‑ or 40‑foot containers under FOB or CIF terms. Buyers often request certificates such as ISO 9001 for quality management, CE marking for EU compliance, and FDA 510(k) clearance for the United States, although the supplier’s catalogue does not state that these certifications are held.

Importers of photochromic lenses usually verify that the lenses meet UV‑blocking standards (e.g., ANSI Z80.3) and that the photochromic dyes are compliant with REACH regulations in the EU. Logistics providers handle the lenses as fragile glass‑or‑plastic items, using “handle with care” markings and palletizing with desiccant packs to prevent moisture ingress. Seasonal demand peaks in spring and summer when photochromic performance is most sought after, influencing container loading schedules.

Sourcing from Danyang Taixu Optical Co., Ltd. - Buyer Guidance

When sourcing from Danyang Taixu Optical Co., Ltd., request material data sheets that confirm the exact polymer composition for the 1.56 lenses and the cellulose‑triacetate formulation for the Cr‑39 lens. Ask for test reports that document UV‑A/B attenuation, photochromic transition time, and compliance with ISO 14729 or equivalent national standards. Verify the supplier can provide samples cut to a standard blank size (e.g., 67 mm diameter) for optical lab evaluation before placing a bulk order.

Confirm the packaging method (sealed moisture‑proof bags, protective film, cardboard case) and whether the lenses are shipped with anti‑scratch coating already applied. Inquire about minimum order quantities, typical lead times for lens grinding and coating, and the Incoterm preferred for the transaction. Request any available third‑party inspection certificates or factory audit reports to substantiate quality control processes.

What lens materials are offered in the catalogue?

The supplier lists high‑index 1.56 plastic lenses with photochromic treatment and a standard Cr‑39 (cellulose‑triacetate) lens with a refractive index of 1.499.

What are the typical optical specifications for the 1.56 photochromic lenses?

Industry practice expects visible light transmittance of 30‑70 % after activation, UV‑A/B blocking above 95 %, and compliance with ISO 14729 for optical performance.

Which standards should a buyer verify for these lenses?

Buyers should request compliance documents for ISO 14729 (optical lenses), ISO 8980‑1 (tolerances), and UV‑blocking standards such as ANSI Z80.3 or EU REACH for the photochromic dyes.

What is a common minimum order quantity for photochromic lenses from Chinese manufacturers?

Typical MOQ ranges from 500 to 1,000 blank lenses, but the exact figure must be confirmed with the supplier for each lens type.

How are the lenses usually packaged for export?

Lenses are generally placed in moisture‑controlled sealed bags, wrapped in anti‑scratch film, and boxed in reinforced cardboard with “fragile” labeling for container loading.

What lead time can a buyer expect for a new order?

Lead times for finished photochromic lenses usually span 4‑6 weeks after final artwork approval, while Cr‑39 blanks may be ready within 2‑3 weeks, depending on production scheduling.

Which certifications are commonly required for optical lenses imported into the EU and US?

Importers often request CE marking for EU markets and FDA 510(k) clearance for the United States, together with ISO 9001 quality‑management certification.

What HS‑code should be used when declaring these products at customs?

The appropriate HS‑code for prescription eyeglass lenses, including high‑index and Cr‑39 types, is 9001.20 under chapter 90 of the Harmonized System.