💡 Pro Tip: Not all float glass is equal. The quality of raw materials, melting conditions, and annealing process directly affect optical distortion, clarity, and mechanical strength—critical for applications like mirrors and solar glass.

🔥 Step 1: Batch Mixing & Melting (1500°C - 1600°C)

Raw materials are precisely weighed and mixed in our 45m-long continuous furnace—one of the longest in the industry—allowing:

• Homogeneous melting with <0.5°C temperature variation
• Energy efficiency through recuperative heat exchangers
• Long residence time (up to 24 hours) for defect elimination

Data Point: Our furnace consumes 15% less energy than industry average thanks to waste heat recovery systems.

🛡️ Step 2: Tin Bath Floatation (1100°C)

The molten glass (density: 2.5g/cm³) flows onto a tin bath (7m wide × 60m long)—why tin?

• Tin has 3x higher density than glass, creating perfect flat surface
• Inert atmosphere (N₂ + H₂) prevents oxidation
• Glass thickness controlled by top rollers and flow rate

Critical Control: Tin bath temperature maintained at 1050°C ±5°C to prevent tin diffusion into glass (which causes "tin side" defects).

🔄 Step 3: Annealing Lehr (600°C → 200°C)

After 6 minutes on the tin bath, glass enters the 120m-long annealing lehr:

• Cooling rate: 20°C/hour to prevent stress fractures
• Temperature gradient: <5°C difference across width
• Residual stress: Kept below 2.5 N/mm² (meets GB15763.2-2005)

Why it matters: Poor annealing causes waviness and optical distortion—critical for automotive and mirror applications.

Schematic of the float glass production process showing key stages from batch mixing to cutting

📏 Step 4: Cutting & Edge Grinding

Automated cutting system with Intermac CNC work center:

• Precision cutting tolerance: ±0.5mm
• Edge grinding removes 0.3-0.5mm of tin-contaminated edges
• Standard sizes: 6000×3210mm, 2440×1830mm

Pro Tip: Always order glass with 10mm oversize for secondary processing like tempering or lamination.

🧪 Step 5: Quality Inspection

Our automated optical inspection system checks:

• Wave distortion: <0.3mm/m (meets GB/T 11614-2009)
• Inclusion count: Max 3 inclusions >0.5mm per m²
• Optical clarity: Light transmittance ≥91% for 6mm clear glass

Rejection rate: We maintain 99.8% first-pass yield—industry average is 98%.

📦 Step 6: Tempering (Optional)

For safety glass (tempered), we use:

• Heat soak: 290°C for 2 hours to prevent spontaneous breakage
• Cooling rate: 15°C/second to achieve ≥69MPa surface compression
• Fragmentation test: Meets EN 12150-1:2015 (50mm×50mm grid)

Industry Standard: Tempered float glass must pass 4-point bending test with load ≥70MPa.

🚛 Step 7: Packaging & Logistics

Our packaging protects 500m² of glass per container:

• Interleaving paper: 100gsm between each pane
• Steel angle protection: 4 corners per crate
• Moisture barrier: VCI film to prevent oxidation
• Weight limit: Max 2.2 tons per crate

Shipping time: 12-15 days to US East Coast ports via Shanghai.

📊 Quality Control Points

• Raw material batch testing: XRF analysis every 2 hours
• Molten glass homogeneity: Optical emission spectroscopy
• Tin bath analysis: Daily ICP-MS for Sn²⁺ contamination
• Annealing verification: Polarimeter stress measurement
• Final inspection: 100% optical inspection with 0.1mm resolution

Our Intermac CNC work center in operation, capable of precision glass processing

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🏭 28 Years of Glass Expertise

Founded in 1996, we've evolved from a family workshop to a ISO 9001:2015 certified manufacturer with:

• 3 modern plants totaling 20,000m²
• 24/7 production with 150+ skilled technicians
• 45m-long tempering furnace (longest in Hebei Province)
• Intermac CNC work center for precision processing

Proven track record: Supplied glass for 500+ projects including commercial buildings, automotive suppliers, and solar farms.

⚙️ Complete Processing Solutions

We don't just supply float glass—we deliver ready-to-install solutions:

• OEM/ODM design services for custom glass solutions
• One-stop processing including tempering, lamination, coating
• Packaging tailored to your logistics (crate vs. wooden box)
• Certification support for CE, FCC, RoHS compliance

Time-saving benefit: Reduce procurement steps from 3 suppliers to 1 with our full-service approach.

🌍 Global Compliance & Certifications

Our products meet the strictest international standards:

• CE Marking for EU market access
• FCC Certification for LED mirror components
• RoHS Compliance (2015/863 EU)
• CMA & CNAS Certification for pattern glass
• GB15763.2-2005 (China float glass standard)
• EN Standards for architectural applications

Documentation advantage: Full test reports available in English, German, French for your compliance team.

🚢 Fast Global Delivery

Time is money in manufacturing. Our advantages:

• Production lead time: 7-10 days for standard sizes
• Container capacity: 500m² per 40HQ container
• Port options: Shanghai, Tianjin, Qingdao (your choice)
• Incoterms: FOB, CIF, DDP available

Logistics innovation: Our modular crate system reduces damage claims by 40% vs. traditional packaging.

💰 Competitive Pricing with No Hidden Costs

We offer transparent pricing with no surprise fees:

Prices subject to raw material fluctuations (silica sand index tracked weekly). FOB Shanghai pricing.

John Smith - Purchasing Manager at SolarTech Solutions (USA)

Delivered: 10,000m² 6mm Ultra-Clear Float Glass

"We've been sourcing float glass from China for 8 years. Shahe Shott Glass stands out with their consistent optical clarity—critical for our solar panel substrates. Their ultra-clear glass has 91.5% light transmittance, better than our previous supplier's 89%. Plus, their packaging reduced breakage by 35% during transit."

Maria Garcia - Project Manager at Arquitectura Moderna (Spain)

Delivered: 5,000m² 10mm Tempered Glass for High-Rise Facade

"For our Madrid office building, we needed tempered float glass with zero optical distortion. Shahe delivered 10mm tempered glass that passed EN 12150-1:2015 with flying colors. The edge strength is exceptional—no chips during installation. Their CE certification gave us confidence for EU compliance."

Chen Wei - Director at GreenTech Energy (China)

Delivered: 8,000m² 6mm Low-E Coated Glass

"As an OEM supplier for solar farms, we need low-E coated float glass with emissivity ≤0.1. Shahe's coating achieves 0.08—better than competitors. Their turnaround time of 8 days saved us critical project milestones. The U-value of 1.2 W/m²K meets our green building requirements."

Klaus Schneider - CEO at DesignGlass GmbH (Germany)

Delivered: 3,000m² Patterned Glass for Hotel Renovation

"For our Berlin hotel project, we needed distortion-free patterned glass for decorative partitions. Shahe's frosted glass has consistent light diffusion—no patchy areas like other suppliers. Their CMA certification was crucial for our Chinese glass sourcing. The mat finish is perfect for our minimalist design."

David Kim - Procurement Director at AutoGlass Korea

Delivered: 12,000m² 8mm Tempered Float Glass for EV Windshields

"As an automotive supplier for Kia, we require tempered float glass that meets ECE R43. Shahe's glass passed all safety tests, including the 4-point bending test at 75MPa. Their delivery reliability (98% on-time) is unmatched in China. The edge compression strength of 80MPa exceeds our requirements."