This video takes you inside a 120–150 tons/month architectural-grade sulfuric acid anodizing production line built for 6500mm aluminum stair handrails. Watch a full walkthrough of the process flow—from degreasing and etching to anodizing, optional electrolytic coloring, sealing, and drying—and see how full-automatic gantry operation supports consistent film thickness, batch color stability, and weather-resistant finishes for large-scale railing projects.