Infografiikka: Miksi H9/H10-kovuusmerkinnät ovat usein vääriä – selitys panssarilasien todellisesta kovuudesta ja testausmenetelmistä.

Why are there so many false H9/H10 hardness markings on the market?

Why are there so many false H9/H10 hardness markings on the market?

If you've ever browsed through tempered glass or tempered glass films , you've probably noticed a huge number of products that claim to have a hardness of H9 , H9+ , or even H10 . Sounds convincing – but there's one problem:

H9–H10 hardness is not even possible in screen protectors.

Yet many vendors and discount stores use these labels because they sound “better” than H7 or H8. In this article, we will explore why these incorrect labels are everywhere and how consumers can identify the correct information.

What does the hardness rating really mean?

Most sellers don't mention that the "H9 hardness" is based on Moe's hardness scale , which is not intended for thin glass and film materials. It is a mineral hardness scale - not a consumer product test.

In addition:

  • The hardness of real bulletproof glass is typically 6H–7H .
  • The hardness of hydrogels and TPU films is inherently softer – around 3H–4H .
  • H10 doesn't even exist in any official testing standard.

So when you see the H9/H10 label, it is practically a marketing term without any scientific basis .

Why do sellers still use H9/H10 labels?

There are three reasons:

  1. Cheap branding – many manufacturers copy each other's packaging and add as many numbers as possible because consumers associate them with better quality.
  2. Ignorance – some retailers don't even know what the scale means.
  3. Price competition – cheap products have to stand out in one way or another, and a big number sells better.

However, a quality screen protector doesn't need fancy numbers – it needs good material, smooth installation, and a functional protective layer.

How to recognize a really high-quality screen protector?

Here you should pay attention to the following things:

  • Does the product have a material description? (e.g. hydrogel, TPU, tempered glass)
  • Does the seller describe the properties concretely? Such as: impact resistance, flexibility, optics, bonding technology.
  • Does the product have manufacturing information and certificates?

For example, Finnish hydrogel protectors describe the actual materials and properties – without unnecessary numerical hype. If you need a harder glass protector, check out bulletproof glasses .

Summary

The H9–H10 hardness markings are mostly marketing gimmicks. A real quality product is not based on numbers, but on how well it protects the screen in everyday life. Choose a screen protector that has been honestly stated and whose material has been actually tested.

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