AGC Dragontrail® Pro
AGC Dragontrail® Pro is a premium chemically strengthened glass developed by AGC, a world-class Japanese manufacturer. Chosen for DeFF’s ULTRA HARD GLASS Screen Protectors, it represents the perfect fusion of material science and craftsmanship.
The Foundation: Unique Float Process Distinct from standard methods, AGC utilizes its proprietary Float Process. By pouring molten glass over liquid tin, the material naturally spreads into a perfectly flat surface. This technique delivers optical-grade flatness and clarity, laying the flawless foundation for our protectors.
The Strength: Ion-Exchange Technology To achieve its incredible durability, the glass undergoes a specialized Ion-Exchange process. Submerged in a 400°C potassium nitrate bath, smaller sodium ions on the surface are replaced by larger potassium ions. This creates a high-density Compressive Stress layer, effectively locking in strength against scratches and impacts.
The Result: Uncompromised Durability The Dragontrail® Pro evolution features a deeper stress layer optimized for modern curved edges, offering superior resistance to chipping. Crucially, DeFF utilizes the original 0.4mm thick glass panel without any thinning treatment. This preserves the material’s full structural integrity, delivering ultra-high durability beyond its class—all while maintaining a smooth, responsive touch experience.
Why we choose
AGC Dragontrail® Pro
Original Thickness
The glass retains its original 0.4mm thickness without being thinned after processing, preserving its rigidity and internal strength for maximum durability.
The Float Process
Flawless by NatureBorn from liquid, not ground by machines. The unique Float Process allows glass to settle naturally over molten tin, creating anatomically flat surface. The result is crystal-clear, distortion-free optics that feel just like your original screen.
Ion-Exchange Technology
Strength Re-engineered is a molecular transformation at 400°C. We chemically replace smaller surface ions with larger, stronger ones. This creates a high-density"invisible shield"of compressive stress, dramatically boosting resistance to scratches and impacts.
2.5D Curved Edges
Smoothly rounded edges provide a seamless, comfortable feel when swiping or holding your phone — eliminating any harsh or sharp edge sensation.
AGC Ultra Hard Glass Screen Protector
Manufacturing Process
CNC Precision Cutting
With a cutting head that moves flexibly and precisely on the horizontal axis, the materials are shaped with near-zero error, this ensures perfect consistency before assembly. Right after shaping, the products go through a specialized grinding/polishing system to remove any dirt and create a smooth, high-quality surface.
CNC Glass cutting
The machine utilizes multiple processing heads and diamond grinding wheels to round and smooth the sharp edges of the cut glass. This stage is crucial for enhancing aesthetics, ensuring user safety, and eliminating micro-cracks, thereby improving the overall durability of the screen protector.
Ultrasonic Cleaning
This stage utilizes a system of liquid tanks and ultrasonic waves to completely remove impurities, microscopic glass fragments, and residual chemicals adhering to the glass surface. The main purpose is to ensure the surface achieves absolute cleanliness before applying critical functional coatings (such as the anti-fingerprint layer, etc.), thereby enhancing the quality and adhesion of the final product.
