At READSUN, every optical frame is inspected from raw material sourcing to final delivery.
Our quality control system covers the entire process — design, prototyping, manufacturing, final inspection, and shipment — ensuring every product meets international standards.
By conducting multi-stage inspections of raw materials, key structural processes, semi-finished products, and finished products, we ensure that every pair of glasses maintains a consistent level of structural stability, assembly precision, appearance quality, and long-term reliability.
All raw materials and components are inspected for appearance, dimensions, and performance to ensure stable processing.
Key forming, bonding, or assembly processes are checked for dimensional accuracy and component fit to ensure structural reliability.
After polishing or surface treatment, each frame is visually inspected for smooth finish, color consistency, and defect-free appearance.
Check shape, dimensions, hinge or joint operation, and identify potential deformation or looseness before final assembly.
Completed frames are fully inspected for structural integrity, assembly precision, functional components, and overall appearance before packaging.
Simulates repeated opening, closing, and stress to verify long-term frame durability.
Applies torsional force to the bridge to evaluate structural stability and deformation resistance.
Tests the strength of the temple–hinge connection under applied torque.
24h / 48h sweat exposure to assess corrosion resistance and coating adhesion.
Detects internal stress or deformation risks in lenses.
Applies approx. 10 kg tensile force to verify overall frame strength.
