Optical Frame Quality Control

Discover our rigorous quality control system for optical frames. Certified to ISO9001 and compliant with RoHS and REACH standards, we provide reliable OEM/ODM solutions for global B2B partners.
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Optical Frame Quality You Can Rely On

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.

Certified Optical Frame Materials & Trusted Suppliers

We source premium materials — including TR90, titanium, PC, and acetate — from certified international suppliers. Each batch is verified for safety, durability, and environmental compliance. For B2B customers, material compliance reports such as RoHS and REACH are available upon request.
  • Acetate Fiber Acetate Sheets

    Selected Material & Origin
    • Mazzucchelli -Italy
    Why This Material
    Recognized as the “Rolls-Royce” of acetate sheets. Exceptional color depth, transparency, and skin-friendly performance unmatched by standard acetate.
    Quality Control
    Only certified Mazzucchelli batches are used. Strict control of thickness consistency, color stability, and baking deformation rate to ensure premium finish and long-term frame stability.
  • Titanium

    Selected Material & Origin
    • Pure Titanium – Japan
    Why This Material
    Japan leads the world in titanium forging and vacuum coating technology, enabling ultra-lightweight, hypoallergenic, and corrosion-resistant frames.
    Quality Control
    Incoming material inspection ensures purity, tensile strength, and surface quality. Controlled processing prevents micro-cracks and ensures structural durability.
  • TR90(TR)

    Selected Material & Origin
    • High-Quality TR90 – Korea
    Why This Material
    Superior elasticity, lightweight feel, and shape memory compared to standard TR90 materials.
    Quality Control
    Material flexibility, rebound performance, and aging resistance are strictly tested to ensure long-term comfort and durability.
  • Ultem

    Selected Material & Origin
    • SABIC – USA
    Why This Material
    The world’s top supplier of ULTEM. Enables ultra-thin frame designs while maintaining extremely high mechanical strength.
    Quality Control
    Mechanical strength, heat resistance, and dimensional stability are tested to ensure frames remain strong despite minimal thickness.
  • Hinges

    Selected Material & Origin
    • OBE Hinges – Germany
    Why This Material
    Industry benchmark for precision hinges. Exceptional fatigue resistance for spring hinges and screws.
    Quality Control
    Each hinge batch undergoes fatigue and opening-cycle testing to ensure tens of thousands of smooth openings without loosening.
  • Resin Lenses

    Selected Material & Origin
    • ZEISS / Essilor
    Why This Material
    World-leading optical brands with outstanding optical clarity and coating technology.
    Quality Control
    Optical performance, thickness tolerance, and coating adhesion are verified to meet international visual and safety standards.
  • Glass Lenses

    Selected Material & Origin
    • SCHOTT – Germany
    Why This Material
    Exceptional light transmission, optical purity, and scratch resistance.
    Quality Control
    Each lens batch is checked for transmittance, surface defects, and dimensional accuracy before assembly.

Optical Frame Quality Control System

Process Control

Professional, Multi-Material Eyewear Testing & Inspection

Metal · Acetate · Injection Frames

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.

  • Incoming Material Inspection
    Incoming Material Inspection

    All raw materials and components are inspected for appearance, dimensions, and performance to ensure stable processing.

  • Critical Structure Control
    Critical Structure Process Control

    Key forming, bonding, or assembly processes are checked for dimensional accuracy and component fit to ensure structural reliability.

  • Surface & Appearance Control
    Surface & Appearance Control

    After polishing or surface treatment, each frame is visually inspected for smooth finish, color consistency, and defect-free appearance.

  • Semi-finished Inspection
    Semi-finished Inspection

    Check shape, dimensions, hinge or joint operation, and identify potential deformation or looseness before final assembly.

  • Final Quality Inspection
    Final Quality Inspection (FQC)

    Completed frames are fully inspected for structural integrity, assembly precision, functional components, and overall appearance before packaging.

Advanced Reliability Testing for Optical Frames

All optical frames undergo comprehensive performance testing. Detailed test reports are available for B2B partners.

Fatigue Test

Simulates repeated opening, closing, and stress to verify long-term frame durability.

Frame Torsion Test

Applies torsional force to the bridge to evaluate structural stability and deformation resistance.

Temple Torque Test

Tests the strength of the temple–hinge connection under applied torque.

Sweat Resistance Test

24h / 48h sweat exposure to assess corrosion resistance and coating adhesion.

Lens Stress Test

Detects internal stress or deformation risks in lenses.

Tensile Strength Test

Applies approx. 10 kg tensile force to verify overall frame strength.

Certifications & Compliance

READSUN is committed to meeting the highest international standards. Our optical frames are certified to support global market access:

Get Your Exclusive Resources Now

To help brand clients quickly validate product quality and capture market trends, we offer exclusive benefits to our major clients:
Free catalog + sample frames
Free selection of samples for you to quickly experience ReadSun product quality
Support for multiple material and style options to aid product decision-making
Bestselling product list
Sharing the top 10 best-selling products in the market and providing the latest market intelligence
Free shipping on your first order, or receive free eyewear accessories

Get a Quick Quote

Please fill in the information below. We will contact you within 1–3 business days and provide you with a personalized product catalog, sample frames, or a list of best-selling items. We promise to keep your information strictly confidential and use it only for resource delivery and subsequent communication.
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