ترمیم شیشه و پولیش شیشه خودرو در تهران

A Technical Review of Thickness Removal and Safety Standards
Glass polishing is one of the most effective methods for removing surface scratches, wiper marks, and micro-abrasions from a vehicle’s windshield. However, many vehicle owners ask an important question:Does glass polishing weaken the windshield or reduce its long-term strength?
To answer accurately, we need to understand the structure of automotive glass, how much material is removed during polishing, and what international safety standards say about this process.
Understanding the Structure of Automotive Glass
A vehicle’s windshield is made of laminated safety glass, consisting of three main layers:
Outer glass layer (Tempered/Annealed)
Middle PVB or EVA layer (Prevents shattering)
Inner glass layer
Typical total windshield thickness: 5.2–6 mmApproximate outer glass layer: 2.5–3 mm
Because polishing removes material from the outer layer, the amount of removal must be controlled and minimal—usually only a few microns.
How Much Material Does Glass Polishing Actually Remove?
Professional glass polishes—especially those based on cerium oxide—are engineered to remove extremely small amounts of material.
Typical removal rates in professional polishing:
1–10 microns depending on scratch severity
Light polishing: below 0.5 microns
For context:1,000 microns = 1 millimeterEven in aggressive polishing, only about 1% of the outer layer’s thickness is removed.
Such removal levels do not affect glass strength.
If a scratch catches your fingernail, it has entered the deeper structural layer.Polishing should not be used for these scratches; professional repair or replacement is recommended.
Safety and Industry Standards for Glass Polishing
According to standards such as:
ANSI Z26.1
ECE R43
SAE J673
Surface repairs are allowed only if:
At least 95% of the outer layer thickness remains No optical distortion (Optical Distortion Index) is created Polishing does not cause excessive heat Only the outer surface is altered
Professional polishing, when done correctly, fully complies with these requirements.
Conclusion: Does Polishing Reduce Windshield Strength?
No.When performed correctly, glass polishing does not reduce the strength of the windshield.
Material removal is minimal (a few microns) Structure and safety remain fully intact Optical clarity improves Reflection and glare decrease Windshield lifespan increases
Only unskilled or overly aggressive polishing poses risk.
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Phone: +989126846083

Website: drglass.ir