judge Electric vehicle helmet It is very simple to check whether the lenses can prevent fog. As long as you exhale on the lens, you can immediately see whether the lens can prevent fog. It is easy to prevent the lens from fogging. There are many methods, such as rubbing on the lens. Apply a little detergent on it to prevent fogging. It can last for about a week. Therefore, anti fog is not the key to judge the anti fog effect of lenses. The focus is on the abrasion resistance and timeliness of lens anti fog.

In places where the lens is not important, breathe at the mouth of a hot water cup, observe the anti fog condition, and dry it with a soft cloth. Repeat this method for more times, and the abrasion resistance of the anti fog surface of the lens will be better. And the antifogging effect has good timeliness. If it can be repeated more than five times, the lens anti fog can be maintained for more than three months. It can be repeated about 20 times, which can basically be regarded as long-term anti fog, and can be maintained for two years without problems.

Many electric vehicle helmets are not anti fogging after wearing them for several days, which indicates that the anti fogging effect of lenses is poor; Or it will not prevent fog after rubbing twice, indicating that the anti fog effect of helmet lens is poor. It can be seen that wear resistance and aging are important indicators for judging the anti fog effect of lenses. It is not resistant to wear and can only maintain a very short anti fog time.