Q12: How Does FELIX GLASS Ensure The Glass Quality ?

Quality is the core of FELIX GLASS's operations. We have established a full-process, multi-stage strict quality control system to ensure that every piece of optical glass, display glass, and custom optical component delivered to customers meets the highest international standards and customer requirements.

### 1. Raw Material Quality Control: The Foundation of Quality

The quality of raw materials directly determines the performance of the final glass product. We only source high-quality optical glass raw materials from certified global suppliers, including BK7, K9, Sapphire, borosilicate, and fused silica. Each batch of raw materials undergoes strict incoming inspection before entering the production line:

- **Optical Performance Inspection**: Test light transmittance, refractive index, and internal defects using professional optical instruments to ensure no bubbles, inclusions, or streaks.

- **Physical Performance Inspection**: Check hardness, density, and thermal expansion coefficient to ensure compliance with material standards.

- **Visual Inspection**: Conduct full appearance inspection to eliminate raw materials with surface scratches, cracks, or color difference.

Only raw materials that pass all inspections can be used for production, eliminating quality risks at the source.

### 2. Precision Processing Quality Control: Ensure Dimensional and Surface Accuracy

In the processing stage, we use imported high-precision CNC processing, polishing, and coating equipment to ensure the stability of the processing process. Each processing link is equipped with strict quality control standards:

- **Dimensional Accuracy Control**: Use coordinate measuring machines (CMM) and micrometers to inspect the size, thickness, and tolerance of each product, ensuring that the dimensional tolerance is controlled within ±0.01mm, meeting high-precision optical requirements.

- **Surface Quality Control**: Use interferometers and surface roughness testers to inspect the surface smoothness, ensuring that the surface roughness (Ra) is below 0.012μm, with no scratches, pits, or other defects.

- **Coating Quality Control**: For coated glass products, use spectrophotometers to inspect coating transmittance, reflectance, and uniformity, ensuring that the coating performance meets customer requirements and has strong adhesion.

### 3. Multi-Stage In-Process and Final Inspection

We implement a 100% full inspection system for all products, with multiple quality inspections throughout the production process:

- **In-Process Inspection (IPQC)**: Conduct inspection after each key processing link (cutting, polishing, coating, etc.) to detect and correct problems in a timely manner, avoiding the flow of defective products to the next process.

- **Final Inspection (FQC)**: After production is completed, conduct a comprehensive inspection of the product, including appearance, size, optical performance, mechanical strength, and environmental adaptability.

- **Special Performance Testing**: Conduct targeted testing according to product application scenarios, such as UV aging test for outdoor glass, high and low temperature cycle test for automotive glass, and scratch resistance test for touch screen glass.

### 4. Quality Management System and Certification

FELIX GLASS has passed the **ISO 9001 international quality management system certification**, and the automotive product line has passed the **IATF 16949 automotive industry quality management system certification**. All production processes are carried out in strict accordance with the system requirements, ensuring the standardization and traceability of quality control. We also provide detailed quality inspection reports for each batch of products, allowing customers to clearly understand the product quality and performance parameters.

### 5. After-Sales Quality Assurance

We provide a comprehensive after-sales quality assurance policy. If there is a quality problem with the product due to manufacturing reasons, we will provide free replacement, repair, or refund services. Our technical team also provides long-term technical support to solve any quality-related problems encountered by customers during use.

At FELIX GLASS, quality is not just a commitment, but a core value that runs through the entire production process. We continuously optimize the quality control system, upgrade testing equipment, and train professional quality inspection teams to ensure that every product delivered to customers is of high quality and reliable performance, becoming a trusted partner for global customers in the optical glass industry.