How Window Tint Works: The Science Behind the Shade

June 17, 2025 apsrustandtint 0 Comments

How Window Tint Works: The Science Behind the Shade

What window tint does goes far beyond darkening your glass—it blocks UV, rejects infrared heat, and controls how much visible light enters your vehicle. Let’s break down the science behind window tinting—and why not all tints are created equal.

Light Transmission, Reflection & Absorption

Window tint films are engineered to manage light in three key ways:

  • Transmission: How much visible light passes through.
  • Reflection: How much light is bounced back.
  • Absorption: How much light and heat the film soaks up.

Films are rated by VLT (Visible Light Transmission). A lower VLT = darker film, but that doesn’t always mean better performance.

Blocking UV & Infrared Radiation

High-quality films block up to 99% of UV rays, protecting your skin and your interior. More advanced tints also target infrared (IR) radiation, which is the primary source of heat.

Types of Window Tint Films

  • Dyed: Low-cost, mainly aesthetic, minimal heat rejection.
  • Metalized: Reflective, but can interfere with GPS/radio.
  • Carbon: Better heat rejection without signal issues.
  • Ceramic: Top-tier film offering superior IR blocking, clarity, and durability.

Does Darker Tint Mean More Protection?

Nope! That’s a myth. A film can be nearly clear yet still block significant heat and UV. It’s all about film composition, not just shade.

Choosing the Right Tint

For optimal performance and comfort, ceramic and IR-blocking films are the modern gold standard. At APS, we carry multiple options to match your needs and your budget.

Want to learn which film is right for your vehicle? Contact our team or explore our window tint packages.

Stay tuned for the next post in our Window Tint Blog Series, where we’ll compare ceramic vs. carbon film head-to-head.