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KINGSTAR GLASS
Low Iron Float Glass | Ultra-Clear Architectural Glass with Maximum Clarity from KINGSTAR BUILDING GLASS
KINGSTAR BUILDING GLASS Low Iron Float Glass is a premium ultra-clear architectural glass manufactured with significantly reduced iron oxide content compared to standard float glass. The result is a crystal-clear glass with exceptional transparency, true color neutrality, and no greenish tint—even at increased thicknesses. With visible light transmittance (VLT) of up to 91% for 6mm thickness, low iron float glass delivers superior clarity and color fidelity that standard clear glass cannot match
What is Low Iron Float Glass?
Low iron float glass—also known as ultra-clear glass, extra-clear glass, or crystal clear glass—is a soda-lime silicate glass produced using the float glass process with significantly reduced iron oxide (Fe₂O₃) content. Standard clear float glass contains a certain percentage of iron oxide impurities, which impart a faint green hue to the glass—a coloration that becomes increasingly noticeable as glass thickness increases. By reducing iron content to below 120 ppm, low iron glass eliminates this green tint entirely, delivering true water-white clarity and exceptional optical performance.
The glass is produced in compliance with EN 572-1, EN 572-2, and EN 572-9 standards, and is CE-marked for use in building applications. KINGSTAR BUILDING GLASS low iron float glass is available in a full range of thicknesses and can be processed into tempered glass, laminated glass, insulating glass units, bent glass, coated glass, and mirrors.
Key Features
- Maximum Clarity: Eliminates the greenish tint of standard glass, offering water-white transparency
- Superior Light Transmission: Visible light transmittance up to 91% for 6mm thickness
- True Color Neutrality: Unmatched color rendering for accurate visual perception of displayed items
- Consistent Performance: No green tint regardless of glass thickness
- Body-Color Integrity: Purity throughout the entire glass thickness—not a surface coating
- Design Versatility: Available in thicknesses from 3mm to 19mm with fully customizable dimensions
- Processing Compatible: Can be tempered, laminated, heat-strengthened, bent, coated, silvered, sandblasted, or acid-etched
- Premium Aesthetic: The most neutral and colorless glass option available
Optical Performance Comparison
Based on 6mm monolithic glass.
| Glass Type | Visible Light Transmittance (VLT) | Color Appearance | Edge Color | Best For |
|---|---|---|---|---|
| Clear Float Glass | 83-89% | Faint green tint | Greenish hue | Standard applications |
| Low Iron Float Glass | 91% | Water-white, neutral | Crystal clear | Premium architectural, display |
Low iron glass consistently achieves higher VLT than standard clear glass, especially as thickness increases. The reduction in iron content delivers up to 87% less green tint compared to standard clear glass.
Technical Specifications
| Parameter | Specification |
|---|---|
| Glass Type | Low Iron Soda-Lime Silicate Float Glass |
| Iron Content | ≤120 ppm Fe₂O₃ |
| Thickness Range | 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 19mm |
| Maximum Size | Up to 3300mm × 6000mm |
| Density | 2,500 kg/m³ |
| Young's Modulus | 70,000 N/mm² |
| Hardness (Knoop) | HK₀.₁/₂₀ 6 GPa |
| Poisson's Ratio | 0.2 |
| Available Configurations | Monolithic, Tempered (EN 12150), Laminated (EN ISO 12543), Insulating Glass Units (IGU), Heat-Strengthened, Bent, Coated, Mirrored |
| Processing Options | Cutting, Edge Grinding, Drilling, Notching, Tempering, Laminating, IGU Assembly, Bending, Coating, Silvering, Sandblasting, Acid-Etching, Silk-Screen Printing |
| Standards Compliance | EN 572-1, EN 572-2, EN 572-9, CE Marked |
| Certifications | ISO 9001 |
| Lead Time | 10-20 days after order confirmation |
| Packaging | Interleaving paper, protective film, wooden crates |
Thermal & Solar Performance
When combined with Low-E coatings or used in insulating glass units, low iron glass delivers enhanced thermal performance while maintaining superior clarity:
| Configuration | Visible Light Transmittance (VLT) | SHGC | U-Value (W/m²K) | Typical Application |
|---|---|---|---|---|
| 6mm Low Iron Monolithic | 91% | 0.82 | 5.8 | Display cases, interior glazing |
| Low Iron IGU (Clear) | 82% | 0.68 | 2.8 | Premium windows, facades |
| Low Iron IGU + Low-E | 70-78% | 0.35-0.50 | 1.4-1.8 | Energy-efficient premium buildings |
| Low Iron IGU + Triple Silver Low-E | 62-70% | 0.24-0.28 | 0.79-1.0 | Passivhaus, extreme climates |
When low iron glass is used as the substrate for solar control coatings, it delivers a 2 to 4 percent improvement in visible light transmittance compared to coated conventional clear glass.
Applications
- Architectural Facades and Curtain Walls: Ultra-clear glass for maximum transparency and neutral aesthetics
- Commercial Buildings: Office towers, shopping centers, hotels, and corporate headquarters
- Display and Retail: Storefront windows, display cases, museum showcases, art galleries
- Premium Residential: Luxury villas, high-end apartments, designer homes
- Furniture and Interior Design: Tabletops, shelving, glass partitions, decorative elements
- Skylights and Roof Glazing: Maximum daylight transmission for overhead applications
- Balustrades and Railings: Ultra-clear railings for unobstructed views
- Mirror Production: Premium silvered mirrors with true color reflection
Why Choose KINGSTAR BUILDING GLASS Low Iron Float Glass?
- Maximum Clarity: 91% visible light transmittance with no green tint—the clearest commercial float glass available
- True Color Neutrality: Unmatched color rendering for accurate visual perception, ideal for display and retail applications
- Body-Color Integrity: Purity throughout the entire glass thickness—will not fade, wear, or peel over time
- Complete Processing Capabilities: Cutting, edging, tempering, laminating, IGU assembly, bending, and coating under one roof
- Full Thickness Range: Available from 3mm to 19mm—customizable to meet any project requirement
- International Standards Compliance: EN 572 certified and CE marked for building applications
- 10 Years of Industry Expertise: With a decade of dedicated experience in architectural glass manufacturing and export, KINGSTAR BUILDING GLASS has delivered low iron float glass solutions to projects across North America, Europe, the Middle East, and Southeast Asia. Our technical team provides expert guidance on glass selection, processing compatibility, and installation requirements.
- Quality Assurance: Strict quality control from raw material selection to final packaging—consistent clarity, uniform thickness, and reliable processing.
Elevate your next architectural project with the unparalleled clarity of low iron float glass—maximum transparency and true color neutrality for premium applications. Share your specifications with our technical team for custom glass solutions, including optical performance data, processing recommendations, and a competitive quote tailored to your project requirements.
Frequently Asked Questions (FAQ)
Q1: What is the difference between low iron float glass and standard clear float glass?
A: Low iron float glass contains significantly less iron oxide (≤120 ppm Fe₂O₃) than standard clear float glass. This reduction eliminates the faint greenish tint that is characteristic of standard glass—a coloration that becomes increasingly noticeable as glass thickness increases. Low iron glass delivers up to 91% visible light transmittance compared to 83-89% for standard clear glass, with up to 87% less green tint. The result is water-white clarity and true color neutrality that standard glass cannot match.
Q2: What is the visible light transmittance of low iron float glass?
A: Low iron float glass achieves visible light transmittance (VLT) of up to 91% for 6mm (1/4 inch) thickness. This represents a significant improvement over standard clear glass, which typically delivers 83-89% VLT depending on thickness. The low iron composition ensures that light transmission remains consistently high even as glass thickness increases. When combined with anti-reflective coatings, low iron glass can achieve even higher transmission levels exceeding 98%.
Q3: Can low iron float glass be tempered or combined with other glass products?
A: Yes. KINGSTAR BUILDING GLASS low iron float glass is fully compatible with tempering (EN 12150), laminating (EN ISO 12543), and insulating glass unit fabrication. It can also be heat-strengthened, bent, coated, silvered, sandblasted, or acid-etched. When combined with Low-E coatings or used in insulating glass units with argon gas fills, low iron glass delivers a 2 to 4 percent improvement in visible light transmittance compared to coated conventional clear glass, making it the preferred substrate for high-performance coated glass applications.
Low Iron Glass is a kind of plate glass with highly clear, highly transmissive and highly smooth. And it is a new type of deeply processed glass, also it is a new type advanced structural glass with environment protection. The glass is a lower iron float glass and be made by a special process. It is not like the clear float glass to sight like green, it looks just like colorless crystal, highly transmissive, and terrific.
Excellent clarity ensures true colors are seen and optimum vision quality is achieved when looking through the glass.
Offers a high level of light transmittance.
Creates maximum light inside rooms due to the products high level of transparency.
Particularly beneficial for thicker laminated products, affording a high level of transparency.
The edges of the glass remain white, unlike other glass making it ideal for use in furniture.
Thickness: 3mm, 3.2mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 19mm, etc.
Sizes: 1830x2440mm, 2134x3300mm, 2134x3660mm, 2250x3300mm, 2250x3660mm, 2440X3660mm, etc. maximum 3660x8000mm
Low Iron Glass is a glass that is desi gned for applications where its unique
appearance and optical qualities are of particular advantage such as:
Display cabinets
Shelves
Glass furniture
Table tops,bars and desk tops
Shower screens
Solar energy industries
Kingstar Building glass: www.kingstar-glass.com
Kinstar Glassware (Professional Glassware & Kitchen Storage): www.kingstarliving.com
Kingstar Building glass:
Email: eric@kingstar-glass.com
Kingstar Glassware
(Professional Glassware & Kitchen Storage):
Email: info@kingstar-glass.com
Address: NO.101 SHENZHEN ROAD, QINGDAO, CHINA
© 2022 Qingdao Kingstar Glass Co., Ltd . All rights reserved Site Map | Technical Support:weidongli
Building glass:
Wechat/Whatsapp: 008618562697682
Email: eric@kingstar-glass.com
Glassware please visit: www.kingstarliving.com
Wechat/Whatsapp: 008615063091883
Email: info@kingstar-glass.com
Address: NO.101 SHENZHEN ROAD, QINGDAO, CHINA
© 2022 Qingdao Kingstar Glass Co., Ltd . All rights reserved Site Map
