What Are the Black Dots on the Windshield?
2 Answers
The black dots on the windshield are a type of glass with a ceramic-like structure. According to explanations from automotive glass manufacturers, these black edges and dots are actually created using a ceramic sintering technology, resulting in a glass structure resembling ceramics. The functions of these black dots are as follows: 1. Improve glass clarity: The high thermal conductivity of the black dots allows heat to distribute more evenly, making the windshield clearer. 2. Enhance glass durability: The black color absorbs heat, and through these variously sized dots, heat is absorbed, stored, and evenly transferred to the center of the glass, effectively preventing windshield cracking. 3. Protect vision: While minimizing obstruction to the driver's view, the black dots also reduce direct sunlight exposure to the eyes, thereby decreasing the harm of strong light to the eyes and helping to alleviate driving fatigue.
Those little black dots on my car were something I initially mistook for dirt or scratches, but later learned they were intentionally designed during manufacturing, known as the frit area. Primarily, they serve an aesthetic transition, blending the black border with the transparent glass to prevent the adhesive edges from appearing too conspicuous and unsightly. Another benefit is reducing sunlight reflection, especially when driving at midday, which helps minimize glare issues, sparing my eyes from discomfort. Additionally, they aid in securing the windshield more firmly, preventing air leaks and water ingress, thereby enhancing the car's sealing. Regular cleaning with a mild glass cleaner is sufficient—avoid using hard objects to scrape, as this could cause damage. Overall, it's a practical and clever design; don’t mistake it for a defect upon first glance.
