Uerglass---Glass scratch repair specialist

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Instruction Manual of Glass Scratch Repair Kit (2016)
Instruction Manual of Glass Scratch Repair Kit (2018)
Demo video of Glass Scratch Repair Kit (2018)


1.What’s the principle of repair?

Answer: This glass scratch repair kit adopts the principle of repair of “grinding followed by polishing”. Taking the most common type of glass scratches for example, we use 1# grinding sheet for coarse grinding then use 2# grinding sheet for fine grinding; next, we use a polishing pad and water for polishing. When polishing ends, repair is complete. If scratches are more serious, all the steps stay unchanged except that we need extend coarse grinding; if scratches are shadow, all the steps stay unchanged except that we skip coarse grinding; if scratches are more shadow, all we need is polishing. This kitis characterized by simple operation, high efficiency, a good effect, a long life of grinding sheets, and no pollution. 

2. What’s the difference between this kit and the felt wheel our factory are using? Our polishing powder can repair scratches, too. What advantages does your product have?

Our polishing powder can repair scratches, too. What advantages does your product have?

Answer: This glass scratch repair kit consists of two grinding sheets and a polishing pad. Customers can choose the size from 2 inches, 3 inches, 4 inches, 5 inches, and 6 inches as they need. Grinding sheets of 2 or 3 inches can finish repair efficiently in a simple way; and grinding sheets of 4, 5, or 6 inches is excellent in repairing serious scratches or welding burns because they can expand the repair area. Cerium oxide polishing powder adopted by factories is mostly for beveling machine, and such device-specific polishing powder is used at high temperature, high pressure, and a high speed. In contrast, our polishing pad with a cerium oxide coating specially designed for manual operation is used at low temperature, low pressure, and a low speed, simpler to operate and more efficient.
Facing scratches, the most common method factories adopt is using polishing powder for beveling machine plus a felt wheel to polish the scratch region. If scratches are a bit serious, it takes longer to polish the scratch region. Factories can only rely on polishing because they don’t have a grinding process. Polishing powder does not have a shearing force, so workers have to polish the same site for a long time in order to repair scratches there. In this case, an obvious pit, i.e. deformation, is probably left in the repair area, which can hardly be controlled. Over polishing powder used by factories, our kit containing grinding sheets has two advantages: One is higher efficiency because it can get scratches off quickly through coarse grinding; the other is that deformation is in control when out kit is used because grinding expands the scratch region. Summing up the above, using our glass scratch repair kit can repair glass scratches quickly in a perfect way.

3.Will the repair of deep scratches with your glass scratch repair kit cause optical distortion?

Answer: Most distortion is caused by pits left where serious scratches are repaired. Imagine that some part of intact glass sags. There must be obvious deformation. However, the same pit expanded in area will be quite gradual and difficult to see from the front. It might be observed when seen carefully from one side or from a nearly horizontal angle. When you use a grinding sheet of 2 or 3 inches contained in our product for repairing general or shadow glass scratches, you can hardly see deformation. Facing a bit serious scratches or welding slag and burns, you may consider the use of a grinding sheet of 4, 5, or 6 inches for repair. The larger the diameter of grinding sheet is, the bigger the grinded area is andthe better the effect of repair is. This is because a bigger grinding sheet expands the grinded area, making the repair area much gentler.

4.Do I need to take training before using this kit? What’s the reason the polished area looks dark? Why brightness is uneven in the polished area?

What’s the reason the polished area looks dark? Why brightness is uneven in the polished area?

Answer: To be clear, we will send a video demoing the use of this kit by WeChat. If you don’t receive this video after buying our product, you can ask for it. This 2018 glass scratch repair kit is easy to learn and operate because there are only two grinding processes and one polishing process. The first grinding process is to get scratches off; the second grinding process is to replace coarse grinding marks with fine grinding marks, for ease of polishing; the last step is polishing. The following are problems needing attention: 1. Keep the grinding sheet totally in contact with glass and not askew to avoid deformation, darkness, and fine lines after polishing. 2. Before polishing, obverse grinding marks carefully and make sure that fine grinding marks cover coarse grinding marks. These two kinds of marks are different, the former exquisite and the latter rough. 3. During polishing, add water to keep the polished area moisture. Observe the repair effect against light. If the effect is satisfactory, repair is complete; if the effect is not very satisfactory at individual sites, continue polishing till the acceptance standard is reached. 4. If the repair effect is not obvious after polishing, you should repeat coarse grinding, fine grinding, and polishing processes in cycle till the acceptance standard is reached. 5. Sometimes brightness is uneven in the repair area. This is because grinding and polishing are in place at the center but not in place around. The right solution is to ensure the fine grinding area is bigger than the coarse grinding area and smaller than the polishing area. Alternatively, you can contact our salesman in time. And we will offer guidance on phone or in WeChat video chatting to ensure you can master the usage of this kit. 

5.What’s the repair efficiency? Won’t it be a heavy waste of time to change the grinding sheet? Do you have any more efficient products?

1. This kit can repair a 5 cm long general scratch in 3–5 minutes.
2. The grinding sheet and tray both adopting magic tape are easy to change. To repair shadow scratches needs 2# grinding sheet and the polishing pad; to repair serious scratches needs 1# grinding sheet for fine grinding, 2# grinding sheet for coarse grinding, and the polishing pad. They both are simple and quick.
3.We are still working on a simpler and more efficient glass scratch repair kit which will use a kind of material excellent both in grinding and in polishing. Quick grinding requires many large particles and quick polishing requires fine grinding. To find such a material, we need keep testing. Our technical department is working in this direction. Let’s look forward to a new breakthrough!

6.Why water is unnecessary in grinding but necessary in polishing?

1. In the 2018 glass scratch repair kit, grinding sheets are of dry grinding type, for the sake of quickness and high efficiency. Water is not needed in grinding.
2.Unlike the 2018 glass scratch repair kit using the polishing pad, the previous kits use felt wheels plus polishing paste for polishing. After polishing, many white marks of polishing paste remain in the repair area, polluting surrounding walls or furniture, if the repaired glass is in a well-decorated room. Besides, polishing paste cannot be transported by air. To make operation easier, avoid environmental pollution, and enhance the polishing efficiency, we coat a pad in polishing powder that can be used for polishing immediately with water. Water is essential because polishing powder cannot work without it. Polishing pads offer convenience for customers who have an urgent need and who stay abroad. They can be transported to customers fast by air.

7.Can this kit repair scratches on tempered glass?

Answer: Sure, it can. In fact, it is easier to repair scratches on tempered glass. During repair, grinding makes temperature at the grinded area rise gradually. Untempered glass may burst when heated to a certain degree. But tempered glass won’t burst because it is more tolerant towards the temperature difference between cold and hot. Thus, we say it’s easier to repair tempered glass. Pay attention to temperature control when you repair untempered glass. Stop operation before glass is too hot to touch. Do not continue until glass temperature drops to room temperature.

8.Does repair destroy the stress of tempered glass? Will glass detonate?

Answer: Tempered glass detonates spontaneously due to the stones, crash, or nickel sulfide crystals inside or due to bursts and deep chips. Scratch repair does change itsthickness but such change is not so serious as the above causes of spontaneous detonation. Consequence unknown, the repair of very serious burns (e.g., the depth of burn is one quarter of the glass thickness) is an exception. For this reason, repairing general scratches is safe, without an impact on the stability of tempered glass. Please feel free to use the kit.   

9.What are limits to the length and depth of scratches it can repair?

Answer: 1. This kit adopts the principle of repair of “grinding followed by polishing”. Grinding has two steps: coarse grinding and fine grinding. Coarse grinding, which fine grinding and polishing follows, is to get scratches off. Since the sheet for coarse grinding has big grinding particles, the grinding efficiency is very high. Taking an example, a 5 cm long scratch left by a stones or sand can be got off basically in 1 minute. Facing more serious scratches or burning by welding slag, you need only extend coarse grinding before fine grinding and polishing. Thus, the kit can repair all scratches no matter how serious they are.
2. The kit can repair all scratches no matter how deep they are. Not to mention the length. If scratches are too long, we advise you repair them in segments.

10.How many square meters of scratches can a kit repair?

Answer: In most cases, scratches on glass are distributed irregularly. A piece of glass may have one scratch or several. Even if there are multiple scratches, it is not necessary repairing the entire piece of glass because that solution is not so cost-effective as replacing. Plus, scratches differ in depth. Anyway, such unit of measurement as square meter is false. We can only introduce the depth of cut left by another piece of glass or by sand. For a 5 cm long general scratch (left by another piece of glass or by sand), a kit (1 coarse grinding sheet, 1 fine grinding sheet, and 1 polishing pad)can repair more than 10 scratch point (each point is roughly priced at RMB 2.7). However, its ability to repair serious scratches like burning by spot welding slag cannot be estimated because both severity of scratches and the acceptance requirement are unknown. 

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1, 目前大多数玻璃加工企业对于划痕的修理办法基本就是用羊毛轮加氧化铈抛光粉(那种砖红色的抛光粉)进行抛光,如果修复的划痕比较浅,采用这个办法修复还是有效果的,但是耗用时间比较长,一般十几分钟到几十分钟,并且在修复结束后会留下一个比较明显的凹坑,有可能在正面都可能会看到。原因就是抛光粉的剪切力比较低,想尽快的将某个位置的划痕修掉,就要比较长时间的停留在那个位置研磨,所以修复后在那个位置就会出现凹坑。因为这个修复位置的玻璃厚度突然比旁边的玻璃厚度要降低,所以凹坑就明显了。但是我们的专业型玻璃划痕修复套装(或者是基本型玻璃划痕修复套装)就能有效的控制这个问题。我们在修复划痕之前,首先要了解验收标准,直视不能发现变形和45度角以内不能发现变形的修复方法是不一样的;对于一条划痕来讲,它的深度是固定的,不管是10微米还是50微米,我们要想修复划痕就要研磨到这个深度,研磨的区域越大,修复的划痕位置的变形就会越小,就不会是突然间出现凹坑,而是很平缓的从浅到深的过渡。具体操作方法就是:确保可调速角磨机的档速是在1档上,使用绿色磨片,粘在相应的研磨底托上,磨片要与玻璃充分、完全接触,不要倾斜,注意喷水,经常查看研磨情况,研磨一会儿就擦干净,透过光查看划痕是否被研磨掉了,如果没有,继续研磨,直到划痕被研磨掉为止。当查看到划痕被研磨片研磨掉后,换粉红色磨片,研磨的区域要将绿色的研磨区域覆盖掉,并比绿色研磨区域扩大出5mm~10mm,以此类推,注意观察研磨情况,一定要全部将前一道的研磨痕迹覆盖。最后进行抛光。第一次的研磨是为了将划痕去除,接下来的研磨是为后面抛光打基础,同时将划痕的位置有效的展开了,然后抛光。如果是深划痕,修复的要求比较高,可以将研磨的区域扩展的更大,扩展的研磨区域越大光畸变越不明显,当然,成本也相应的增加。我们的抛光膏不同于前面提到的砖红色的抛光粉,我们这种抛光膏有着很强的剪切力,抛光很快。经过以上几个程序,一个划痕就修复完成了。
2, 如果是一个比较深的划痕,一般就会因为没有办法修或者因花费工时太长而放弃,整块玻璃就报废了。而我们的这套划痕修复套装是使用分级的研磨办法,第一级的磨片比较粗,是35μ的,可以很快将划痕磨掉,不管是多深的划痕,在我们的修复视频上可以看到,最深的划痕是由36目的砂轮片制造的,是一般情况下玻璃厂里面很不容易产生的。经过粗磨、精磨、抛光以后,划痕的位置又恢复到了明亮如新。所以,对于我们这两套产品来讲,无论任何划痕、瑕疵都是完全修复的。


1, 毛道修复,不会产生光畸变:
3, 深划痕修复,可有效控制畸变。









1, 对玻璃和磨片降温,在研磨过程中玻璃会因为研磨而发热,适当加水会为玻璃有效降温,防止玻璃过热而炸裂;另外,磨片也不能过热,过热会导致磨片上的金刚石颗粒同磨片分离,影响研磨效果和磨片寿命;
2, 冲刷研磨过程中的玻璃粉末,研磨过程中研磨片和玻璃摩擦会出现很多玻璃粉末,应该及时清理,最好的办法就是用水进行冲刷,及时冲刷,有利于确保是磨片的颗粒在对玻璃进行研磨,而不是研磨刚刚研磨下来的玻璃粉末;同时对划痕修复进度可以及时了解;同时还能防止过度研磨而导致的磨片浪费;
3, 增加剪切力,没有水有时磨片会在玻璃上打滑,起不到很好的研磨作用;

1, 研磨下来的玻璃粉末不能及时、有效的清除,造成的后果就是降低研磨效率和磨片的浪费;
2, 不能控制玻璃和磨片的温度,造成玻璃炸裂的危险和使磨片上的金刚石颗粒脱落,造成浪费;







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How to use

We have a long-term cooperative tie with an excellent scratch repair team that can provide door-to-door repair services for customers in need.
If you have a need, please contact our business people in advance for an appointment to avoid unnecessary costs.
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