In-House Lab
What can our Laboratory do for you?
- Performs requested tests and issues dated reports
- Archives both physical/electronic copies for 3 years
- Documents: Test date, order, style, and requester
Artificial Sweat Test Chamber
Artificial sweat testing simulates long-term wear by immersing eyewear in a pH 4.5-6.5 solution (lactic acid/NaCl mix) at 30°C. Samples soak for 24-168 hours in a climate chamber, then undergo:
1️⃣ Nickel ion detection (atomic absorption)
2️⃣ Coating adhesion check (tape test)
3️⃣ Surface corrosion inspection
Compliance threshold: <0.5μg/cm²/week nickel release (EU REACH).
Salt Spray Test
Standard Test Types：
- Neutral Salt Spray (NSS)
Standard: ASTM B117 / ISO 9227
Solution: 5% NaCl, pH 6.5-7.2
Use: Baseline corrosion resistance check - Acetic Acid Salt Spray (AASS)
Standard: ISO 9227
Solution: 5% NaCl + acetic acid (pH 3.1-3.3)
Use: Accelerated testing for decorative coatings - Copper-Accelerated Salt Spray (CASS)
Standard: ISO 9227
Solution: 5% NaCl + CuCl₂ (pH 3.1-3.3)
Use: Fast evaluation of nickel/copper layers
Eyewear-Specific Applications：
✔ Frame Hinges (96h NSS for titanium alloys)
✔ Metal Temples (48h AASS for plating adhesion)
✔ Nose Pads (24h CASS for nickel release check)
✔ Decorative Elements (72h NSS for PVD coatings)
Complementary Tests：
▸ Cyclic Corrosion Test (salt spray + humidity)
▸ Artificial Sweat + Salt Spray Combination
Eyewear Frame Flammability Tester
An eyewear flammability tester evaluates frame safety by exposing samples to controlled flames (per ISO 12870). It measures:
- Burn rate (≤3mm/s for acetate)
- After-flame time (≤5 sec)
- Dripping behavior (no molten drops)
Critical for children’s/sports glasses, ensuring materials self-extinguish. Tests include horizontal (frames) and vertical (temples) flame exposure with calibrated butane flames (20±2mm).
Eyewear Frame Fatigue Tester
This instrument simulates years of wear through repetitive stress tests:
✔ 10,000+ hinge open/close cycles (ISO 12870)
✔ 5,000+ temple flexing motions (45° deflection)
✔ Nose pad compression tests (20N force)
Bridge Flex Tester
This device evaluates nose pad durability by simulating 10,000+ flex cycles (ISO 12870). It measures:
- Resistance to cracking
- Permanent deformation (<5%)
- Spring tension retention
Critical for metal/acetate frames to ensure long-term comfort. Tests run at 23±5°C with 30N force.
Eyewear Frame Alloy Analyzer
This XRF (X-ray Fluorescence) device identifies metal composition in seconds, detecting:
- Nickel content (EU REACH compliance)
- Titanium purity (Grade 2/5 verification)
- Plating thickness (μm-level accuracy)
Essential for:
- Material certification (ISO 5832)
- Nickel-free claims (<0.05%)
- Counterfeit detection
Portable models allow factory-floor checks.
Hinge Tensile Tester
A hinge tensile tester evaluates eyewear durability by simulating 10,000+ open/close cycles (ISO 12870). It measures:
- Hinge resistance (5-20N force range)
- Plastic deformation (<2° permanent bend)
- Failure points (spring/ screw fatigue)
Critical for metal/acetate hinges, ensuring 3+ years of daily use. Tests run at 60 cycles/minute with torque monitoring.
Lensometer
This precision instrument measures:
- Optical power (Sph/Cyl 0.01D accuracy)
- Axis orientation (±1° precision)
- Pupillary distance (PD)
Used for:
- Verifying prescription lenses
- Quality control in labs
- Frame alignment checks
Digital models auto-print specs and store data.
Prism Diopter Tester
Key functions:
✔ Base direction detection (0-360°±1°)
✔ Vertical/Horizontal prism (0-20Δ range)
✔ Prentice rule verification
Used for:
Progressive lens QC
Prism prescription validation
Safety glasses ANSI Z87.1 compliance
Digital models auto-plot prismatic deviations.
Polarimeter
This device verifies polarized lens performance by:
- Measuring polarization efficiency (>99% for premium sunglasses)
- Detecting axis alignment (±2° accuracy)
- Identifying stress patterns in lens material
Critical for:
- Fishing/driving glasses QA
- Anti-glare lens certification
- 3D movie glasses production
Handheld models feature instant LCD results.
Standard Light Box
This calibrated viewing station provides consistent lighting for:
- Color matching (D65, CWF, UV light modes)
- Metamerism detection (material/coating batches)
- QC inspections (scratches/coating defects)
Key features:
5+ light sources (LED/fluorescent)
45°/0° viewing geometry
ISO 3664 & ASTM D1729 compliant
Sunglass Lens Uniformity Tester
This instrument maps optical consistency by scanning 9+ points on lenses to measure:
- Transmittance deviation (<5% tolerance)
- UV protection uniformity (380-400nm)
- Color gradient shifts (ΔE<3)
Critical for:
- Polarized lens QA
- Gradient tint verification
- Anti-reflective coating checks
Automated models generate heatmap reports.