我们偶尔会看到有些汽车前大灯发黄，表面好像有一层水汽薄雾，不美观还影响照明，不少汽车在使用几年后都会出现这种情况，我们称之为大灯老化。那么汽车大灯老化原因是什么？需不需要翻新？

We occasionally see that the headlights of some cars turn yellow, and there seems to be a layer of water vapor mist on the surface, which also affects the lighting. This happens to many cars after several years of use. We call it headlamp aging. So what is the reason for the aging of automobile headlights? Need renovation?

为什么大灯会老化？

Why does the headlamp age?

刚出厂的新车大灯透光率和光亮度都很高。当车子用了一段时间，尤其是用了三五年的车子，你会发现你的车灯已经不像刚开始那么亮了，但是发出来的光会更暗。

The headlights of the new car that just left the factory have high transmittance and brightness. When the car has been used for a period of time, especially for 35 years, you will find that your lights are not as bright as they were at the beginning, but the light will be darker.

主要是因为车辆长时间在室外停放，车辆的大灯灯罩表面经过长时间的烈日、酸雨腐蚀、风化和长期夜间行驶后氧化，形成雾状膜，不仅影响美观，还会降低大灯罩的透光率，导致车灯变暗。当车辆出现这种情况时，如果不及时对大灯进行翻新和维修，就会影响我们夜间行驶时的行车安全。

This is mainly because the vehicle is parked outdoors for a long time, and the surface of the headlamp cover of the vehicle is oxidized after long-term hot sun, acid rain corrosion, weathering and long-term night driving, forming a fog like film, which not only affects the appearance, but also reduces the light transmittance of the headlamp cover, resulting in the darkening of the lamp. When this happens to the vehicle, if the headlights are not renovated and repaired in time, our driving safety at night will be affected.

因为大灯主要材质是塑料，时间久了塑料会发生降解反应，尤其是大灯灯罩经常处于高温曝晒和酸雨的环境下，塑料更容易氧化发黄、龟裂、模糊不清、透光度下降。有些车主误以为大灯老化必须更换新的大灯，其实大灯是可以翻新修复的。

Because the main material of the headlamp is plastic, the plastic will degrade over time. In particular, the headlamp shade is often exposed to high temperature and acid rain, so the plastic is more prone to oxidation, yellowing, cracking, blurring and light transmittance reduction. Some car owners mistakenly think that the headlights are aging and must be replaced with new ones. In fact, the headlights can be renovated and repaired.

翻新过程：

Refurbishment process:

此次大灯翻新采用雾化镀膜法，也是建议为常见的翻新方法，其原理是：利用加热大灯翻新修复液，产生雾化气体与灯罩产生交联反应，形成透明层，灯罩就会恢复原有的光亮。

This headlamp renovation adopts the atomization coating method, which is also recommended as a common renovation method. Its principle is: using the heating headlamp renovation repair fluid, the atomized gas will produce a cross-linking reaction with the lampshade to form a transparent layer, and the lampshade will restore its original brightness.

1.镀膜前需要打磨灯罩去除表面氧化层，首先围绕大灯边缘贴美纹纸胶带，防止打磨时损坏车漆。

1. before coating, polish the lamp cover to remove the surface oxide layer. First, stick masking tape around the edge of the headlamp to prevent damage to the car paint during polishing.

2.打磨车灯，砂纸背面的数字代表砂纸的规格，数字越大砂纸的磨料越细及每平方英寸的磨料数量越多。不断加水保证表面湿润，依次用砂纸加水打磨大灯表面，直至表面光滑平整，每一个角落都不能遗漏，否则将影响镀膜的效果，甚至要重新打磨。打磨完毕后师傅用高压气枪吹干表面水分，然后用纸擦干。

2. polish the lamp. The number on the back of the sandpaper represents the specification of the sandpaper. The larger the number, the finer the abrasive of the sandpaper and the more abrasive per square inch. Keep adding water to ensure the surface is wet, and polish the headlamp surface with sandpaper in turn until the surface is smooth and flat, and no corner can be omitted, otherwise the coating effect will be affected, and even the surface will be polished again. After polishing, the master uses a high-pressure air gun to dry the surface moisture, and then wipes it with paper.

3.往雾化镀膜装置（喷雾罐）加入大灯翻新修复液，接通电源，通电5分钟加热瓶内的大灯修复液，喷雾口会喷出雾化的镀膜液，注意安全不能对着人。

3. add the headlamp repair fluid to the atomizing coating device (spray tank), turn on the power supply, and heat the headlamp repair fluid in the bottle for 5 minutes. The atomized coating fluid will be sprayed from the spray port. Be careful not to face people.

4.济南奥迪汽车保养人员以车灯某个角落为起点，喷雾口在距离灯罩表面1厘米处按竖向开始镀膜，马上能看到神奇的现象，模糊的大灯表面会瞬间变清晰。

4. the maintenance personnel of Jinan Audi automobile take a corner of the lamp as the starting point, and the spray mouth starts coating vertically at the place 1 cm away from the surface of the lampshade. They can immediately see the magical phenomenon, and the fuzzy headlamp surface will become clear in an instant.

汽车大灯就像我们人的眼睛一样。作为汽车的重要部件之一，尤其是在夜间，它可以给我们的驾驶带来一定的安全性。对老化的汽车大灯进行翻新是很有必要的！对这一问题还存在任何疑问，都欢迎关注我们网站http://www.lutongqixiu.com并咨询我们的工作人员，将竭诚为您服务。

Car headlights are like our eyes. As one of the important parts of a car, especially at night, it can bring certain safety to our driving. It is necessary to renovate the aged car headlights! If you have any questions about this issue, you are welcome to follow our website http://www.lutongqixiu.com And consult our staff, will serve you wholeheartedly.