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China Suppliers Factory Ultra-Clear Tempered Glass - Low Iron, Custom Sizes, High Transmittance
Introduction
Glass Specifications
Optical Performance
- Visible Light Transmittance (VLT): 91.5%–92.5% (6mm)
- Solar Heat Gain Coefficient (SHGC): 0.87–0.90 (6mm)
- UV Transmittance: ≈75% (without coating)
- Reflectance: ≈8% (surface reflection)
Physical & Chemical Properties
- Density: 2.5 g/cm³
- Thermal Expansion: 9.0×10⁻⁶/K (20–300°C)
- Softening Point: 720°C
- Annealing Point: 550°C
- Acid/Alkali Resistance: Class A (ISO 695)
Frequently Asked Questions
What is the light transmittance of this ultra-white glass?
The Visible Light Transmittance (VLT) ranges between 91.5% and 92.5% for a standard 6mm thickness, providing exceptional clarity compared to standard glass.
How does the glass perform under chemical exposure?
It features high chemical stability with Class A ratings for both acid and alkali resistance according to ISO 695 standards.
What is the softening point of this glass?
The glass has a softening point of 720°C and an annealing point of 550°C, ensuring stability under various thermal processing conditions.
What is the density and thermal expansion coefficient?
The density is 2.5 g/cm³, and the thermal expansion coefficient is 9.0×10⁻⁶/K within the temperature range of 20–300°C.
Does this glass block UV rays?
Without additional coating, the UV transmittance is approximately 75%. For higher UV protection, specialized coatings can be applied.