One: Toothpaste

It can remove tiny scratches on the screen of the mobile phone.

1 smooth

You can buy a toothpaste with blue crystals and wipe it on the scratch of your mobile phone with a paper towel. It takes a long time depending on the size of the scratch. Slowly, you will find that the scratch becomes smaller and then disappears. Don't dry the toothpaste when you wipe it, add some water when it is quick.

2 polishing

You will find that the mobile phone screen is not so easy to leave fingerprints and easy to clean after you wipe it in the same way as whitening toothpaste.

Of course, you can also buy a maintenance agent to repair it, but if the technology is not good, it is easy to appear one screen after another.

Two: polishing agent

I went to the motorcycle parts store and bought a tube of "polishing agent" (the price is generally around 5 yuan). I squeeze out some paper towels and wipe the screen clockwise or counterclockwise to remove scratches and stains that are difficult to remove. This principle is the same as toothpaste, but the effect is better than toothpaste.

Three: Go to a professional mobile phone beauty salon, where there is a polishing machine. The polishing time is the same as when you buy it (recommended).

2. How to repair the scratches on the mobile phone case?

Toothpaste can remove tiny scratches on the screen of mobile phones. The steps are as follows:

Smooth. You can buy a toothpaste with blue crystals and wipe it on the scratch of your mobile phone with a paper towel. It takes a long time depending on the size of the scratch. Slowly, you will find that the scratch becomes smaller and then disappears. Don't dry the toothpaste when you wipe it. Add some water when it is quick.

Polishing. You will find that the mobile phone screen is not so easy to leave fingerprints, and it is easy to clean after being wiped in the same way as whitening toothpaste.

polishing agent

I went to a motorcycle parts store and bought a tube of "polishing agent" (the price is generally around 5 yuan). I squeeze out some facial tissues and wipe the screen clockwise or counterclockwise to remove scratches and stains that are difficult to remove. This principle is the same as toothpaste, but the effect is better than toothpaste.

Go to a professional mobile phone beauty salon, where there is a polishing machine, and the polishing time is the same as that of the new one.

Commonly used friction agents in toothpaste are:

Toothpaste related pictures ① Calcium carbonate (CaCO3): There are two kinds of calcium carbonate: heavy calcium carbonate and light calcium carbonate. Heavy calcium carbonate is made by crushing, grinding and refining limestone and calcite in rocks. Light calcium carbonate is obtained by dissolving calcium salt in hydrochloric acid and then introducing carbon dioxide. Light calcium carbonate has fine particles and light specific gravity, and can be used in toothpaste.

Calcium hydrogen phosphate (calcium hydrogen phosphate dihydrate CaHPO4? 2H2O and anhydrous calcium hydrogen phosphate (CaHPO4): Calcium hydrogen phosphate can be divided into dihydrate salt and anhydrous salt of bimolecular water. The dihydrate salt has good miscibility with other ingredients, but due to the high hardness and strong friction of anhydrous salt, 5%~ 10% anhydrous salt can be mixed into the dihydrate salt in the special toothpaste for removing smoke marks.

Calcium pyrophosphate (Ca2P2O7): Calcium pyrophosphate is obtained by treating calcium hydrogen phosphate at high temperature. Because it does not react with fluoride, it can be used as the base material of fluoride toothpaste.

Hydrated silicic acid (SiO2 nH2O): Hydrated silicic acid is a very fine white particle, which can be used in transparent toothpaste. In addition, because of its large specific volume, it can be used as a filler and tackifier for toothpaste.

3. What if there are scratches on the back cover of the mobile phone?

1, use a small rag, it's a little wet, stick a little toothpaste, and rub it on the screen of the mobile phone for more than ten seconds, and the original scratch will disappear.

2, use cooking oil, this is suitable for small scratches. If there is only a slight scratch on the screen, you can drop a few drops of vegetable oil on the scratch and gently wipe the screen with a clean and soft rag or toilet paper, and the scratch will disappear.

Step 3 Use polishing paste. Do not wet the cloth with water, then apply a little polishing paste, and polish the scratches. Do not use too much force, because too much force will affect the smoothness of the screen surface. When polishing, be sure to ensure the humidity of the cloth, and observe it every time you grind it, and then you can get a good screen as always.

Step 4 use talcum powder. Mix talcum powder and water according to the ratio of 2: 1, spread it evenly on the screen, and then wipe it clean, and the scratches will disappear.

4. How to deal with the scratches on the mobile phone?

Today's beauty technology makes people beautiful. In fact, we can also give a "facelift" to the "injured" mobile phone case. We only need to spend 10 to 20 yuan to make the broken case "radiant and beautiful as ever". But in this "operation" process, some professional tools will be used, such as paint gun, sander, oven, UV machine and so on. Some friends may say, where do we have these devices? In fact, what I want to tell you is that since plastic surgery is to be done in a hospital, our mobile phone case will also be done in a special place. Oh, by the way, our "Honghui" exquisite spray paint factory is such a professional "beauty center" and one of the best manufacturers in the same industry in Shenzhen. The reason why this technology is posted here today is just to let everyone know about the process and quality of the whole shell repair, so as not to be confused by JS's nonsense in the market. Well, before it's too late, let's start "operating" the shell.

1. Remove the phone case. In this process, we must be careful to prevent the shell from cracking, otherwise it will not be worth the loss. You know, a cracked shell is basically irreparable.

2. draw pictures. According to the true color of the shell, it is made of special paint for mobile phones, diluted water, shading powder and other materials in a certain proportion. This process is professional, so I won't go into details here.

3. Remove the surface ultraviolet curing material. UV is the abbreviation of ultraviolet ray. Ultraviolet curing is a photochemical reaction, that is, liquid ultraviolet radiation curable materials are printed or coated on the surface of substrate or workpiece, and then hardened by ultraviolet radiation. If some mobile phone cases are coated with UV curing materials, they should be removed on the sandblasting machine, otherwise they cannot be repainted. Generally speaking, this step can be omitted if there is no such material on the surface.

Polishing. This is the key step to control the maintenance quality. For the shell made of hardware, it is generally polished with ordinary sandpaper of model 800. If the shell is rough, use 600 sandpaper for rough grinding and 800 sandpaper for fine grinding. (If it is a plastic case, use 1500 sandpaper). In the process of polishing, all burrs, scratches and paint drops on the shell should be carefully polished under fluorescent lamp. When we say polishing, we don't mean to wear off the "scar" all the time, but to follow the original shape of the shell. For example, the corner of the shell is circular, so it should be polished along this circular arc, and it can't be polished straight from left to right and from top to bottom, which will destroy the original shape of the shell. In addition, if some scratches on the shell are too deep, you need to fill some special silica gel on it to make the scratches "full".

5. Dust. Because there is a lot of dust attached to the polished shell surface, if it is not cleaned up, it will seriously affect the painting effect. We can generally clean or blow air to remove dust from the shell.

6. Protection of important parts. For the screen, LOGO screen printing, camera and other places on the mobile phone, tape should be attached to protect them from being sprayed by paint, or wax should be coated on them with crayons, so that the paint stuck on the wax can be easily removed. If there is a shell with a large screen size, a corresponding painting fixture should be made to protect the screen part.

7. painting. This is the highlight of the whole restoration process. If manual painting is used, it is best to do it in a dust-free environment. In addition, the technical methods of spray painters must be mature and capable. The distance of the spray gun and the uniformity of painting are very important, and it is difficult for inexperienced novices to master this "feel".

8. baking. The plastic shell should be baked in an oven at 40-60 degrees for about 20 minutes, and the metal shell should be baked in an oven at 70 degrees or above for 30-60 minutes.

5. There are scratches on the back of the mobile phone case. How to deal with them?

Scratch when you think of toothpaste, right? But don't wipe the phone screen with children's toothpaste. Just prepare ordinary toothpaste.

First squeeze a little toothpaste on a cotton swab or a clean cloth, then gently rub it in circles where there are scratches until the scratches disappear, and finally gently wipe off the excess toothpaste. Some foreign netizens have successfully confirmed on Twitter that they can use sandpaper and grinder to remove edge cracks, but this method is not recommended on the screen and is only suitable for removing scratches on the fuselage.

In addition, when using this method, the amount of sandpaper must be at least, and attention should be paid to control, otherwise there will be more and more scratches. Baking soda powder is really a universal cleaner, which can not only conquer all stains in the kitchen, but also the mobile phone.

First, set the ratio of baking soda to water at 2: 1 to make baking soda powder water into paste, then dip a cotton swab or cloth in baking soda powder water and gently wipe the scratched place in circles. .