Photochromic Lenses


WeeTect Photochromic Lenses (WPL) also names photochromatic lenses, transitional lenses, photogray lenses or reaction lenses. It is made from photochromic film and polycarbonate lenses co-injection molding or photochromic coating on polycarbonate lenses. WeeTect Photochromic Lenses (WPL) can be applied to photochromic sunglasses, photochromic goggles, transition glasses, photochromic glasses, transition sunglasses, photochromic cycling glasses, transition eyeglasses, photochromaic lenses, photochromic spectacles, photochromic safety glasses, transition eyeglasses and other photochromic eyewear.

As WeeTect is a capable photochromic lens manufacturer, WeeTect Photochromic Lenses (WPL) is one of the best photochromic lenses with a super high VLT when it is photochromic clear in house, and turns to photochromic tint on exposure to UV light quickly. In advance, WeeTect Photochromic Lenses (WPL) can be added more surface treatment such as anti-fog coating, anti-scratch coating, anti-fingerprint coating and more. As an eye and face protection solution provider, WeeTect holds the know-how of photochromic coating and co-mold photochromic technology. We are glad to develop other special combination such as photochromic polarized sunglasses or prescription transition lenses to support your niche market.

Photochromic Lenses  Advantages:

  • Convenience: you only need to offer your customer one pair of photochromic sunglasses for the varying light conditions.
  • UV protection: WeeTect Photochromic Lenses (WPL) absorbs 100% harmful UV radiation.
  • One stop solution: WeeTect Photochromic Lenses (WPL) also offers anti-fog coating, hard coating, abrasion resistant coating, anti-fingerprint coating or other color tinting.
  • Reduce cost: WeeTect is a capable photochromic lens manufacturer to share cost advantage to you.
More Details

Here is a photochromic ebook for you to learn more about photochromic technology

Item Property Test Method U/M Value
Optical UV Resistant EN170 % 99.99%
Haze ASTM D 1003 % 0.37
VLT Before Photochromic Tint ASTM D 1003 % 87
VLT Fully Photochromic Tint ASTM D 1003 % 20
Fully Photochromic Tint Time WeeTect Method Second 22
Change Back to Photochromic Clear Time WeeTect Method Minutes 3
Fog Free time ECE22.05/ECE324 s >22
Fog Free time Freezing Test s no fogging
Mechanical Hardness 1KG ISO 178 H 1
High velocity impact ANSI Z87.1 2010 ft/s >300
Cross-Cut tape test ASTM D 1000 NA Pass
Elongation, yield  % 7 ISO 527 % 7
Elongation, break ISO 527 % 110 ISO 527 % 110
Tensile stress, yield ISO 527 Mpa 60
Tensile modulus  MPa ISO 527 Mpa 2300
Flexural strength, yield ISO 178 Mpa 100
Flexural modulus ISO 178 MPa 2500 ISO 178 Mpa 2500
Izod notched impact, 20 °C ISO 180-1A KJ/m² 65
Physical Gravity ISO 1183 g/cm³ 1.2
Water absorption, 24 hours ISO 62 % 0.15
Thermal Mold shrinkage ISO527 % 0.5-0.7
Thermal expansion ASTM D696 1/ °C 7×10-5
Vicat Softening Temp., Rate B / 120(base sheet) ISO 306 °C 150
HDT, 0.45 MPa ISO 75/Be °C 138

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