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Guangzhou tempered glass manufacturers, how to avoid low light transmission and brittleness in architectural glass and extra-clear glass

Release time:

Mar 22,2025

How to avoid low light transmission and fragility in ultra-clear glass? A guide to avoiding pitfalls!

Ultra-clear glass, with its high light transmission rate and lack of noticeable green tint, is widely used in high-end buildings, display cabinets, and high-grade doors and windows. However, improper selection may lead to decreased light transmission or glass breakage. Here are some key points to avoid these issues:

1. Light transmission not high enough? Pay attention to these points when selecting!

Key point: Glass composition and iron content

- High-quality ultra-clear glass has lower iron content (≤0.015%), with light transmission reaching 91%~93%. Inferior glass has a higher iron content, which may result in a slight green tint, affecting the visual effect.

- When selecting, check the glass optical parameters; the light transmittance should be ≥91% to avoid purchasing low-quality products.

Key point: Glass thickness affects light transmission

- The thicker the ultra-clear glass, the slightly lower the light transmission. It is recommended to choose the appropriate thickness according to the Applications.

- Regular light transmission reference:

- 6mm ultra-clear glass: Light transmission rate of approximately 92%

- 10mm ultra-clear glass: Light transmission rate of approximately 91%

- 15mm and above: Light transmission rate will decrease further

Key point: Avoid surface coatings affecting light transmission

- Some ultra-clear glass may have coatings added (such as Low-E glass), which may alter the light transmission rate.

- If you pursue ultimate transparency, it is recommended to choose ultra-clear glass without coating.

2. Easy to break? Key points to improve strength!

Key point: Prioritize tempered or laminated processes

- Tempered ultra-clear glass: Impact resistance is 4-5 times higher than ordinary glass, reducing the risk of breakage.

- Laminated ultra-clear glass: Even if broken, the glass fragments remain adhered to the intermediate PVB adhesive layer, providing higher safety.

- Recommended combination:

- Ordinary scenarios: 6~10mm tempered ultra-clear glass

- Floor-to-ceiling windows/large glass curtain walls: 8+1.52PVB+8mm laminated ultra-clear glass

Key point: Anti-spontaneous breakage treatment (HST treatment)

- Tempered glass has a risk of spontaneous breakage, especially ultra-clear glass. If the original sheet quality is poor, it is easier to cause spontaneous breakage due to nickel sulfide substances.

- It is recommended to choose HST (heat immersion treatment) glass, which can reduce the risk of spontaneous breakage by more than 90%.

Key point: Installation method to avoid stress concentration

- The edges of the glass are the most vulnerable parts. During installation, avoid direct hard contact. It is recommended to use rubber gaskets and silicone sealing to reduce stress.

Pitfalls to avoid when purchasing ultra-clear glass

1. Choose products with low iron content, light transmittance ≥91%, avoiding fake ultra-clear glass.

2. Choose appropriate thickness (6-10mm) to avoid excessive thickness affecting light transmission.

3. If enhanced safety is required, choose tempered or laminated ultra-clear glass.

4. For high-altitude/large-area glass, choose HST treatment to prevent spontaneous breakage.

5. Pay attention to the protection of glass edges during installation to prevent breakage due to stress.

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