What is 21D tempered glass film for mobile phone?

We’ve talked about 2.5D and 3D mobile phone tempered glass film in the past. 2.5D or 3D corresponds to the curvature of the curved surface or the edge of the tempered glass film. However, later, new terms such as 4D, 5D, 8D, 9D, 10D, 12D and so on have been invented in the industry, and now 21D tempered glass film has emerged. So, what does the 21D mean? Does 21D have any special meaning?

Let’s go straight, 21D doesn’t make sense. We have introduced 2D, 2.5D and 3D tempered glass film, in fact, unless 2D, 2.5D and 3D tempered film, the rest of the so-called “4D” and “5D” don’t make any sense, the same as “21D”, it is just a gimmick from some manufacturers. The name is used to highlight that “its products are better and more advanced than others”, but do you think it really works?

It is the competition in the industry. Tempered glass film products for mobile phone have risen with the birth of smart phones. After so many years of development, the competition in the mobile phone tempered film industry has been fierce, the supply side is saturated, the demand has not grown much, the products are mature, and there is a lack of innovation, so some manufacturers “innovate” by their names, such as the 21D tempered glass film mentioned in this article, and even the words 11H in the picture (usually it is 9H, but still it doesn’t make too much sense), are all gimmicks, and you can simply ignore them.

So, what aspects should be paid attention to when purchasing mobile phone tempered glass film? We have listed some points related to the characteristics of mobile phone tempered film as follows. The following are the points that need to be paid attention to when purchasing tempered film:

1. Material of tempered glass film;

2. Tempered film AB glue

3. Dimensional accuracy of tempered glass film

4. Tempered glass film oleophobic layer

We will detail in another article about these characteristics of tempered film.