In-House Lab

In-House Lab 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 55°C. Samples soak for 24-168 hours in a climate chamber, then undergo:

• Nickel ion detection (atomic absorption)
• Coating adhesion check (tape test)
• Surface corrosion inspection

Compliance threshold: <0.5μg/cm²/week nickel release (EU REACH).

Artificial Sweat Test Chamber

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

Contact us to know more

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.

Artificial Sweat Test Chamber

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.

Artificial Sweat Test Chamber