Lens Materials of Plastic Eyeglasses

Nowadays, the huge variety of eyeglasses in the store may differ in lens material, frame material as well as their styles. There are commonly referred metal eyeglasses and plastic glasses. In most cases, the term "plastic eyeglasses" refers to eyeglasses that have plastic frames. This is particularly true when some citizen want to compare metal spectacles with plastic ones. These two frame materials do have some different features. They both have their respective pros and cons. However, plastic eyeglasses can also be used to narrate glasses made of plastic lenses. When we compare plastic eyeglass lenses, they were undoubtedly a great invention in the 20th century, before which nearly all eyeglass lenses were made from glass. It is widely known that glass lenses are quite heavy that a pair of these lenses can exert primary weight on the wearer's nose. Worse still, glass lenses are quite brittle so that they will break easily. In a serious case, the eyes may get injured. It was these disadvantages of glass lenses that forced innovators to create an alternative.

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Lightweight, shatter-resistant plastic lenses are the excellent solution. In general, plastic eyeglass lenses are much lighter, safer and more durable than glass lenses. These advantageous features are very important for many wearers. They can enjoy relieve and safety from these plastic eyeglasses. It is estimated that roughly 70% of the world's eyeglass lenses are made of plastic. After a concentrate of decades' progression, there are currently many forms of plastics that can be used to make eyeglass lenses. Most of these involved plastics have further advantages compared with traditional plastic.

As a special plastic, Cr-39 has been the approved material for eyeglass lenses for many years. Lenses made from this material have only a half the weight of glass lenses. In addition, Cr-39 eyeglass lenses have good Uv light protection. Being less likely to shatter, Cr-39 plastic eyeglasses can still be treated with advanced coatings such as scratch-resistant coating. Someone else special divergence of plastic is polycarbonate, which features climatic characteristic resistance, impact resistance and optical properties. Polycarbonate eyeglass lenses are thinner and lighter than Cr-39 lenses. An astonishing highlight of these lenses is that they are 10 times more impact-resistant than glass or regular plastic lenses. As a result, polycarbonate lenses are adored by safety glasses and children's eyeglasses. There are still high index plastic lenses, which are commonly thinner and lighter than regular Cr-39 plastic lenses. They undoubtedly refer to a variety of plastic lens materials.

Lens Materials of Plastic Eyeglasses

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Issues With Plastic Headlight Lenses and How to Clean Them With a Headlight Cleaner

In the past, automakers designed headlight lenses made from glass so they were miniature in the size and shape they could produce. Since then, auto manufacturers began designing cars with plastic or polycarbonate headlight lenses. This modification generally occurred due to the convert in the develop of cars---cars became lighter and more aerodynamic, plus plastic was by far less costly to yield than glass. Today this plastic material is the chosen selection because it is very light and can be transformed into unlimited sizes and shapes to satisfy new car designs.

[b]Lens[/b]

Polycarbonate has its advantages but also has its disadvantages---namely oxidation / discoloration. To the naked eye one cannot tell that these plastic lenses are positively a porous material that expands ever so slightly when it gets hot. Degradation of the lens occurs over time. Having your headlights on or being exposed to the heat of the day causes the pores to open allowing debris from the road to get in. Debris, together with a composition of environmental factors such as the sun (Uv rays), smog, acid rain, car exhaust, and harsh chemicals used to wash you car can cause the plastic headlight lenses to come to be oxidized.

Plastic oxidation leads to lens discoloration, which transforms new, clear, bright, shiny plastic to a dull yellow tint that appears to be foggy, hazy, or cloudy. This process (oxidation), as described above, not only becomes an eyesore but also is unsafe. Because of the degradation of the plastic lens, less light passed straight through resulting in diminished visibility during night driving. The car owner either had to deal with these cloudy yellow, oxidized headlight lenses posing serious protection issues or purchase costly transfer headlights costing hundreds or thousands of dollars.

We feel it is primary to familiarize the public so that they may know and learn how to restore, clean, polish, and clear those cloudy, yellow plastic headlight lenses on their own without putting more money into the car manufacturer's pocket. One can restore headlights to like-new condition by taking off the top layer of oxidized plastic. This can be achieved straight through polishing, wet sanding, or straight through the use of chemicals. Auto manufacturers would rather you go to them for a headlight fix (charging as much as 0) or headlight transfer (0-,000). The top layer of plastic on the headlights contains a Uv polymer that retards or slows down the aging of the plastic lens. Therefore, it is leading to use a polish (containing Uv polymers) or Uv coating to slow down the oxidation or discoloration of the lens. Parking your car in the shade or garage, or maintaining the lens by washing, waxing, and polishing a minimum of every three months, could avoid damage to the headlight lens.

There are many companies that specialize in headlight recovery and one can positively find one by naturally putting in a keyword phrase such as "cloudy foggy headlights" into any of the favorite quest engines like google, yahoo, or msn. There are two types of headlight cleaners / headlight recovery kits:

1. Basic Headlight recovery Kit (for light discoloration)
2. Advanced Headlight recovery Kit (for more severe discoloration)

Most headlight recovery kits work highly well. Choosing a kit depends on the severity of your vehicle's lenses. Most kits ready online are very easy to use and do not require the use of special tools or training. Beware of kits that offer backing plates and drill attachments. While they may save time, they may cause irreversible damage due to assorted drill speeds causing burning or swirls in the plastic lens. First-time users should avoid these kits because it takes skill and institution to control the drill from making these mistakes and maybe slipping off and ruining a perfectly fine paint job.

In some kits like an Advanced Headlight recovery Kit, they may even furnish a small roll of blue painters tape to mask your headlight to safe your paint job during the recovery process. Along with both kits, one should receive a step-by-step brochure outlining how to clean headlights appropriately to derive bright, shiny headlamps while restoring optic clarity to your lenses. Both kits should carry a satisfaction guarantee. It is also a great resource if the enterprise has tech hold for anyone that has questions while reconditioning their headlamps so trained technicians can walk you straight through the quick and easy process of headlight restoration.

Issues With Plastic Headlight Lenses and How to Clean Them With a Headlight Cleaner

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