Modern smartphones, including the popular Xiaomi Redmi 9, feature high-brightness and saturation displays that require careful attention. The screen is the most vulnerable design element, as it takes the brunt of accidental falls or contact with keys in your pocket. Many users mistakenly believe that Gorilla Glass is enough factory glass to fully protect, but even it does not withstand direct contact with sand or quartz.
Choosing a quality accessory becomes a top priority, because it depends not only on the aesthetics of the device, but also on its further liquidity. There are a huge number of options on the market, and it is very easy to get confused about the characteristics of hardness and types of glue. In this article, we will discuss in detail what parameters should be paid attention to protect the display of your gadget.
Do not save on screen protection, as the replacement of the display module can cost in the 40-60% And if you get the right glass, you can not only save the matrix from cracking, but you can also keep the tactile sensations of the device in your hands.
Key characteristics of protective glass
When choosing an accessory for Redmi 9, the first thing to consider is the hardness marking. Most manufacturers specify the 9H parameter, which means surface resistance to scratches with a Mohs hardness of 6-7. This allows you to protect the screen from knives, coins and keys, but does not guarantee 100% protection from falling on asphalt.
The second important parameter is the oleophobic coating, which is the thinnest layer that is responsible for missing fingerprints and sliding your finger easily across the screen. Cheap counterparts often lack the quality of the oleophobic coating, which quickly makes the screen greasy and sticky, and the finger stumbles when playing or typing.
⚠️ Note: If the seller claims that the glass is hard 10H The Mohs scale, which measures the hardness of glass, ends at 9 for this type of man-made materials.
The thickness of the protective layer should also be considered. Too thick glass (more than 0.4 mm) can worsen the sensitivity of the touchscreen or not fit under the case at all. The optimal indicator for Xiaomi is the range from 0.2 to 0.33 mm.
Types of protective coatings: matte or glossy
The choice between glossy and matte is entirely dependent on the use cases of your smartphone. The glossy glass retains the factory brightness and contrast of the image, making the picture on the Redmi 9 screen juicy and rich. It is ideal for watching videos and working with photos.
Matte glass (Anti-glare) has a rough surface that scatters light, which completely eliminates glare from the sun or lamps, which is critical for gamers and people who often work in bright light, but the cost of not glare is a loss of clarity: the picture becomes a little “grainy” and the colors are less saturated.
- 🎨 Glossy - retain the original quality of the picture, but shine in the sun.
- 🎮 Mattes are perfect for games, the finger slides like oil, there are no reflections.
- 🛡️ Hydrogel films – extinguish shocks, but give weak protection from scratches and have a specific texture.
For Xiaomi Redmi 9, which is often used as a multimedia center, most users choose classic transparent glass.It provides the best visual experience.Matte options should only be considered if you are an avid mobile gamer or are often outdoors.
Why is matte glass cheaper?
Adhesive technologies: silicone or glue
One of the most important technical aspects is the type of adhesive layer, which is that modern quality glass for Redmi 9 uses a special silicone layer that is glued to the screen throughout the area, which ensures that there is no air layer ("rainbow effect") and high sensitivity.
Cheap options can only use adhesive frames around the perimeter, and the center of the glass is an air cushion that degrades visual perception and makes the glass vulnerable to chipping when it hits the center, and it often peels off at corners over time.
There's also technology. UV-A glue that is often used for curved screens, but is also suitable for Xiaomi flat displays: Liquid glue is applied to the screen, glass is placed on top, and the structure is illuminated by an ultraviolet lamp. This provides a monolithic connection, but requires skills to install.
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Before buying glass with adhesive frame, be sure to check compatibility with your case.The frame can be wider than the cutout in the case, causing the glass to peel off at the edges.
Compatibility with covers and 3D-format
The screen of the smartphone Xiaomi Redmi 9 has slightly rounded edges (2.5D), This is a problem for flat-paneled glass. 2D-The glass will not stick around the edges and will look like an island in the center of the screen. 3D or 5D.
These glass panes have curved black or transparent edges that completely overlap the useful area of the display, but this raises the question of compatibility with covers. 3D-glass, creating characteristic "mustache" - zones of detachment along the perimeter.
| Type of glass | Coverage of the square | Compatibility with covers | Protection of the edges |
|---|---|---|---|
| 2D (flat) | Only the center | Tall. | Absent. |
| 3D (curved) | Complete. | Medium (needs a case under glass) | Tall. |
| UV-glass | Complete. | Depends on the thickness. | Maximum |
When you buy 3D-In the Redmi 9, the speaker is in the top bezel, and if the glass is deaf, the sound will be quieter and the person will hear themselves in the tube.
Quality check before purchase
How do you distinguish quality glass from cheap glass in a store or when you get an order? First of all, check the packaging. Good brands like Nillkin, Baseus or Hoco supply the goods in hard cardboard boxes with a cleaning kit (wet and dry wipe, dust).
Check the ends of the glass for a lumen. They should be perfectly polished and have no chips. If you swipe from center to edge, the transition should be barely noticeable. A sharp difference in height indicates a low quality of processing, such glass will quickly break off when worn in your pocket.
- 💧 Drain water to the surface: on a good oleophobic coating, the drops will collect into ideal spheres and easily roll over.
- 👀 Look at the glass at an angle: there should be no rainbow overflows, indicating the tension of the material.
- 📏 Measure the thickness: if 0.3 mm is claimed, but in fact more than 0.5 mm is a sign of cheapness.
⚠️ Warning: Avoid colored glass (gold, blue) if you are not sure the exact match of the shade with the body. Often, such frames look cheap and can climb over time.
Instructions: how to properly paste the glass
The success of your Xiaomi protection depends on the correct adhesive, 90% of which means that even the most expensive glass can be damaged if you don't remove the dust, and that the process must be done in a room with minimal air movement so that the dust doesn't settle on the screen.
First, wipe the screen thoroughly with a wet wipe, removing the fat and dirt. Then dry with a dry cloth. The most important step is to use a sticky tape (dust remover) from the kit, and walk it all over the screen, removing the microscopic villi.
☑️ Checklist before sticker
Carefully apply the glass to the speaker grid and the front camera. Don't press the center right away! Make sure the edges match, lightly press the top. The glass will stick on its own, expelling air. If there are any bubbles left, gently push them from the center to the edges with a dry wipe.
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The secret of the perfect sticker is to take your time in the dust removal phase, and one speck of dust under the glass will create an air pocket that you can't remove without pasting.