How to judge the quality of Stainless Steel Mirror Protective Film

Protective Film Quality Assessment Guide

The material of high-quality protective film feels delicate and smooth, without rough graininess.
Can rebound quickly after bending, and is not easy to produce permanent creases.
Gently scratch the surface with your fingernail - no obvious scratches will be left.
The material has good toughness and is not easy to break when pulled.
Inferior products may feel stiff, easy to tear, easy to scratch on the surface.
May have more impurities in the material, poor light transmittance, and even pungent odor.

After sticking the protective film on the stainless steel mirror, use a hard object to gently scratch the surface.
High-quality products can effectively block scratches and protect the mirror from damage.
Observe its anti-fouling performance - liquids slide off quickly without penetration.
No residual trace after cleaning with high-quality films.
Inferior products easily absorb stains, are difficult to clean, and may allow stains to penetrate.

High-quality films fit tightly with the stainless steel mirror surface.
Bubbles are not easily generated and can be removed by simple processing if they appear.
Edges are firmly fitted and not easy to warp.
No local bulging or loosening after application.
Inferior products produce numerous bubbles that are difficult to eliminate.
Edges prone to warping with uneven viscosity - some areas too tight while others fall off.

High-quality products maintain stable performance in high temperature and humid environments.
No deformation, yellowing or decreased viscosity.
Maintains viscosity after multiple peeling and pasting tests.
Leaves no glue stains on the mirror surface.
Inferior products may age and crack after environmental changes.
Lose viscosity quickly and leave difficult-to-remove glue marks.