plain white glass
Tempered Clear Glass Clear Float Glass
Product SpecificationsIntroduction
Basic Characteristics
Clear float glass is made from soda-lime silicate composition using the float process (tin bath forming). It features a colorless and transparent appearance, with a slight green tint visible at the edges (caused by iron ions in the raw materials).
Dimensional Specifications
Available in thicknesses ranging from 2mm to 25mm, with 3mm, 5mm, 6mm, 8mm, and 10mm being the most commonly used. Standard sheet size is 2440×3660mm, with customization available up to a maximum size of 3300×6000mm. The material density is 2.5g/cm³.
Optical Properties
Visible light transmittance ≥89% at 3mm thickness, with direct solar transmittance ≥88%. Color difference under standard light conditions is ΔE≤2, ensuring visual consistency.
Properties
Softening point: 720±10°C
Coefficient of thermal expansion: 9.0×10⁻⁶/°C (within 20-300°C range)
Thermal conductivity: 0.76W/(m·K)
Mechanical Properties
Flexural strength: ≥40MPa
Compressive strength: 800-1000MPa
Elastic modulus: 72GPa
Meets standard architectural structural requirements.
Chemical Composition
Main components:
SiO₂ (71-73%)
Na₂O (12-14%)
CaO (8-10%)
MgO (3-4%)
Fe₂O₃ content controlled at ≤0.1%
Quality Standards
Complies with Chinese National Standard GB 11614-2009 "Float Glass".
Permissible defects:
Bubbles: ≤0.5mm diameter (≤3 per m²)
Scratches: ≤0.1mm width, ≤50mm length
Secondary Processing Compatibility
Suitable for tempering, laminating, insulating, coating, and screen printing processes.
Cutting tolerance: Diagonal deviation ≤2mm (within 2000mm dimensions).
Applications
Primarily used in:
Architectural windows and curtain walls
Furniture tabletops and partitions
Appliance panels (e.g., oven doors)
Base material for primary lenses
Storage & Transportation Requirements
Must be stored vertically (tilt angle ≥5°) in dry conditions, protected from acid/alkali corrosion.
Visible light transmittance ≥89% at 3mm thickness, with direct solar transmittance ≥88%. Color difference under standard light conditions is ΔE≤2, ensuring visual consistency.
Properties
Softening point: 720±10°C
Coefficient of thermal expansion: 9.0×10⁻⁶/°C (within 20-300°C range)
Thermal conductivity: 0.76W/(m·K)
Mechanical Properties
Flexural strength: ≥40MPa
Compressive strength: 800-1000MPa
Elastic modulus: 72GPa
Meets standard architectural structural requirements.
Chemical Composition
Main components:
SiO₂ (71-73%)
Na₂O (12-14%)
CaO (8-10%)
MgO (3-4%)
Fe₂O₃ content controlled at ≤0.1%
Quality Standards
Complies with Chinese National Standard GB 11614-2009 "Float Glass".
Permissible defects:
Bubbles: ≤0.5mm diameter (≤3 per m²)
Scratches: ≤0.1mm width, ≤50mm length
Secondary Processing Compatibility
Suitable for tempering, laminating, insulating, coating, and screen printing processes.
Cutting tolerance: Diagonal deviation ≤2mm (within 2000mm dimensions).
Applications
Primarily used in:
Architectural windows and curtain walls
Furniture tabletops and partitions
Appliance panels (e.g., oven doors)
Base material for primary lenses
Storage & Transportation Requirements
Must be stored vertically (tilt angle ≥5°) in dry conditions, protected from acid/alkali corrosion.
1. What is clear float glass?
Clear float glass is a standard transparent glass produced by floating molten glass on a bed of molten tin, resulting in a smooth, distortion-free surface. It is commonly used in windows, doors, and other architectural applications.
2. What are the standard thicknesses available?
Typical thicknesses range from 2mm to 25mm, with the most common options being 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, and 12mm.
3. Why does clear float glass sometimes appear slightly green?
The green tint is caused by iron oxide (Fe₂O₃) in the raw materials. Thicker glass or edge views make this tint more noticeable. For a more neutral appearance, low-iron glass (ultra-clear glass) is available.
4. What is the light transmittance of clear float glass?
For 3mm thickness, the visible light transmittance is ≥89%, meaning it allows most natural light to pass through.
5. Can clear float glass be tempered or laminated?
Yes, it can be further processed into:
Tempered glass (heat-treated for strength and safety)
Laminated glass (sandwiched with PVB for security and sound insulation)
Insulated glass (double glazing) for better thermal performance
6.What are the temperature resistance limits?
Softening point: ~720°C
Thermal expansion coefficient: 8.5–9.5 × 10⁻⁶/°C (20°C–300°C)
Avoid sudden temperature changes to prevent thermal stress cracking.
Clear float glass is a standard transparent glass produced by floating molten glass on a bed of molten tin, resulting in a smooth, distortion-free surface. It is commonly used in windows, doors, and other architectural applications.
2. What are the standard thicknesses available?
Typical thicknesses range from 2mm to 25mm, with the most common options being 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, and 12mm.
3. Why does clear float glass sometimes appear slightly green?
The green tint is caused by iron oxide (Fe₂O₃) in the raw materials. Thicker glass or edge views make this tint more noticeable. For a more neutral appearance, low-iron glass (ultra-clear glass) is available.
4. What is the light transmittance of clear float glass?
For 3mm thickness, the visible light transmittance is ≥89%, meaning it allows most natural light to pass through.
5. Can clear float glass be tempered or laminated?
Yes, it can be further processed into:
Tempered glass (heat-treated for strength and safety)
Laminated glass (sandwiched with PVB for security and sound insulation)
Insulated glass (double glazing) for better thermal performance
6.What are the temperature resistance limits?
Softening point: ~720°C
Thermal expansion coefficient: 8.5–9.5 × 10⁻⁶/°C (20°C–300°C)
Avoid sudden temperature changes to prevent thermal stress cracking.