🟧 Introduction

In aluminum finishing, visual beauty means nothing without precision.
 At Golden East for Trade & Industry, anodizing quality is managed through strict control of anodic oxide layer thickness following the global ISO 7599 standard.

🔹 What Is ISO 7599?

ISO 7599 defines the technical requirements for anodizing aluminum — including layer thickness, surface quality, corrosion resistance, and testing methods.
It serves as a universal benchmark for architectural, industrial, and decorative anodizing applications.

🔹 How Is Layer Thickness Measured?

Golden East uses advanced, non-destructive instruments to ensure accuracy:

• Eddy Current Thickness Gauges for instant, precise readings.
• Reference Samples for regular calibration verification.
• Multiple-point measurements along each extrusion for layer uniformity.

Measurements are performed:

1. Immediately after anodizing,
2. After sealing,
3. And after coloring when required.

🔹 Standard Thickness Classes (per ISO 7599)

• AA10 (10 µm): Indoor applications.
• AA15 (15 µm): Decorative light-duty uses.
• AA20 (20 µm): Standard outdoor protection.
• AA25 (25 µm): Marine or severe environments.

Each category is selected based on end-use and exposure conditions.

🔹 Golden East’s Quality Assurance System

The factory’s QA process includes:

• Digital data logging for real-time thickness tracking.
• Statistical Process Control (SPC) to detect deviations early.
• Routine calibration with certified international standards.
• Final inspection under the Quality Department before packing.

Every product leaving our facility carries our signature of excellence —
 “Precision in Every Detail.”

🟩 Conclusion

Thickness control isn’t just a technical step — it’s part of the Golden East quality mindset.
By implementing ISO 7599 meticulously, we ensure every anodized aluminum product delivers not only visual beauty but globally certified protection.