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Anti-scratch coating
An anti-scratch or scratch-resistant coating is a film or coating that can be applied to optical surfaces, such as the faces of a lens or photographic film. The coating does not interfere with how the lens functions and does not affect vision, but creates a permanent bond with the lens that reduces the appearance of hairline scratches which is common to eyeglass lenses. Though an anti-scratch coating is not 100% scratch-proof, it helps to prevent minor scratches that can easily happen to a regular lens. These minor scratches can damage the surface of the lens and impair vision. An anti-scratch coating acts as a protective layer thus making the lenses more durable and safe.
In addition to lenses, anti-scratch coatings are often used on plastic products wherever optical clarity, weathering and chemical resistance are required. These include optical discs, displays, injection-molded parts, gauges and other instruments, mirrors, signs, eye safety/protective goggles, and cosmetic packaging. These coatings are usually water-based or solvent-based.
Anti-scratch coatings are generally applied via spray (hand or automated), dip, spin, roll or flow coating. Most coating types can be cleaned with a non-ammonia based glass cleaner and a soft cloth.
==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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