Anti-haze technology and why it matters for large displays
Apr 06, 2026
South China Glass Group just published a patent for low-haze cover glass manufacturing. The filing from January 2026 targets a problem most buyers do not think about until it is too late. -3
What glass haze actually is
Haze is scattered light passing through the glass. Hold a piece of glass up to a bright light. If it looks milky or cloudy, that is haze. Low haze means clear. High haze means foggy.
In cover glass, haze comes from two sources:
Surface haze: Microscopic roughness from polishing or etching. Anti-glare surfaces intentionally create haze to reduce reflections.
Internal haze: Impurities or phase separation inside the glass. This is a manufacturing defect.
The problem South China Glass is solving
When you polish cover glass, the process can leave tiny surface irregularities. Those irregularities scatter light. That scattering is haze. But here is the catch: aggressive polishing removes scratches but increases haze. Gentle polishing preserves clarity but leaves scratches.
The patent describes a glass composition with optimized acid resistance. The idea is to control how the glass reacts to polishing slurries. By tuning the composition, the manufacturer can use more aggressive polishing without creating haze.
Why this matters for large displays
Haze is invisible on a phone screen. The display is small and bright. On a 15-inch automotive display or a 32-inch monitor, haze becomes obvious. Users see a white film over dark images.
What to ask your supplier
Request haze data measured according to ASTM D1003 or ISO 14782. Acceptable haze for premium automotive displays is under 1%. For phones, under 3% is fine. If your supplier cannot provide haze numbers, they are not measuring it.
The trend
Anti-glare (AG) glass is growing fast in automotive and laptop markets. But AG works by creating controlled surface haze. The challenge is balancing anti-glare performance (higher haze) with image clarity (lower haze). The patent points to a future where glass makers can fine-tune this trade-off at the chemistry level, not just the surface treatment level.
