What are the main cost factors of a Cheap 1.56 Finish Photochromic Progressive Brown lens in china
The first is the organic color-changing material of the Cheap 1.56 Finish Photochromic Progressive Brown lens. This is not difficult to understand. The synthesis of the color-changing material is very difficult, and it is the most important part of the cost allocation in the lens. The color-changing material of the Cheap 1.56 Finish Photochromic Progressive Brown lens in china directly determines the color change speed and color change durability. If the color change speed is increased by 10%, the cost of color-changing materials may increase by 100%.
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Purchasing principles for the Best 1.56 Finish Photochromic Progressive Brown lens products
Today, the editor summarizes and recommends the purchasing principles of the Best 1.56 Finish Photochromic Progressive Brown lens products: the key indicators in the color-changing performance are initial transmittance, fading speed, color-changing depth, and color-changing durability. In the fading process of the Best 1.56 Finish Photochromic Progressive Brown lens, the two indicators of fading speed and whether the initial state can be reached after fading are very important, which are the performance watershed.
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What are the properties of the customized 1.56 Finish Photochromic Progressive Brown lens from China
The first is the initial transmittance. The initial transmittance of the customized 1.56 Finish Photochromic Progressive Brown lens refers to the state of the lens before discoloration. The higher the transmittance, the more transparent the lens is. The second is the color change speed: it refers to the time it takes for the customized 1.56 Finish Photochromic Progressive Brown lens from China from the initial to the deepest state. Generally speaking, the faster the better, but the performance difference between brands is not large in this regard.
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What is the principle of quality 1.56 Finish Photochromic Progressive Brown lens
The quality 1.56 Finish Photochromic Progressive Brown lens contains silver halide (silver chloride, silver bromide) crystallites, and when irradiated by activating light such as ultraviolet light or short-wave visible light, halide ions emit electrons, which are captured by silver ions. The following reactions occur in the quality 1.56 Finish Photochromic Progressive Brown lens: the colorless silver halide is decomposed into opaque silver atoms and transparent halogen atoms, and the silver atoms absorb light to reduce the light transmittance of the lens.
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Why do people need a pair of good price and quality 1.56 finish photochromic progressive brown lens
Having a suitable good price and quality 1.56 finish photochromic progressive brown lens can not only help people resist the fierce sunlight, but also protect the eyes from ultraviolet rays, effectively reducing the probability of cataracts. The good price and quality 1.56 finish photochromic progressive brown lens can be used in workplaces such as outdoor fields, snow, and indoor strong light sources to prevent damage to the eyes from sunlight, ultraviolet light, and glare.
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