Window tinting refers to the application of a thin film to the interior or exterior of glass surfaces. This film varies in darkness, impacting light transmission and heat rejection. For automotive applications, the darkness is often expressed as Visible Light Transmission (VLT) percentage, with lower percentages indicating darker tints. For example, a 5% VLT tint allows only 5% of visible light to pass through.
Controlling light and heat offers numerous advantages. Reduced glare improves visibility and driving comfort. Lower interior temperatures protect vehicle upholstery from fading and cracking caused by UV radiation. Increased privacy enhances security. Historically, window tinting served primarily aesthetic purposes, but its functional benefits have become increasingly recognized, leading to widespread adoption and regulation.