UK consumer? ScreenProtector.co.uk  ·  US consumer? Screen-Protectors.com
Engineering Tool

Hardness Scale
for custom screen protectors

Understand what 3H, 6H and 9H pencil hardness do and do not mean.

Custom screen protector inspection on a manufacturing bench
Interactive Resource

Use the tool

This is an estimating resource, not a substitute for drawing review or sample approval.

3H-4H: basic hard-coated films for light scratch resistance.

6H: higher-grade films where flexibility still matters.

9H: common tempered glass pencil-hardness claim; useful for scratch resistance, not a drop-test result.

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