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JINGYING OEM Silver Jewelry: Nikl bez niklu, High-Polish, Tarnish & Water-Resistant Finishes

Zveřejněno na podle Kingjy

JINGYING OEM Silver Jewelry: Nikl bez niklu, High-Polish, Tarnish & Water-Resistant Finishes

Zavedení

In today’s jewelry market, consumers demand not only aesthetic appeal but also safety, durability, and hypoallergenic properties. Jinging, as a leading OEM jewelry manufacturer, specializes in producing nickel-free silver jewelry s high-polish finishes, tarnish resistance, a water resistance. This article explores our advanced manufacturing processes, material selection, and quality control measures that ensure premium-quality, skin-friendly, and long-lasting jewelry.

1. Nickel-Free Silver Jewelry: Safety & Compliance

1.1 Why Nickel-Free?

  • Skin Safety: Nickel is a common allergen, causing contact dermatitis in 10–20% of the population.

  • Regulatory Compliance: Meets EU Nickel Directive (REACH), California Proposition 65, and other international standards.

1.2 Materials Used in JINGYING’s Nickel-Free Jewelry

Material Composition Properties
925 Sterling Silver 92.5% Stříbro + 7.5% Copper (Nickel-Free Alloy) Hypoalergenní, tarnish-resistant with proper coating
Argentium Silver 93.5% Stříbro + 6.5% Germanium Highly tarnish-resistant, brighter than traditional sterling silver
Rhodium-Plated Silver 925 Stříbro + Rhodium pokovování Scratch-resistant, ultra-shiny, nickel-free
Gold-Plated Silver 925 Stříbro + 18K Gold Plating Luxusní vzhled, nickel-free underlayer

1.3 Testing for Nickel Content

  • DMG Test (Dimethylglyoxime Spot Test) – Detects nickel leaching.

  • XRF (X-Ray Fluorescence) Analysis – Ensures compliance with international standards.

2. High-Polish Finishing Techniques

2.1 Polishing Process

  1. Pre-Polishing (Rough Finishing)

    • Tumbling – Barrel polishing with stainless steel media for initial smoothing.

    • Filing & Sanding – Removing casting seams with 600–1200 grit sandpaper.

  2. High-Polish Buffing

    • Muslin Wheel + Diamond Compound – Achieves mirror-like shine.

    • Ultrasonic Polishing – For intricate designs.

2.2 Advanced Finishing Options

  • Mirror Polish – Reflective, ultra-smooth surface.

  • Satin Finish – Soft, brushed look.

  • Florentine Finish – Cross-hatched texture.

3. Tarnish-Resistant Coatings

3.1 Why Jewelry Tarnishes?

  • Oxidation: Silver reacts with sulfur in the air, forming black silver sulfide.

  • Moisture & Chemicals: Perfume, sweat, and chlorine accelerate tarnishing.

3.2 JINGYING’s Anti-Tarnish Solutions

Method Jak to funguje Benefits
Protective Lacquer (E-Coating) Clear epoxy/polyurethane layer blocks air exposure Invisible shield, lasts 6–12 months
Rhodium pokovování Electroplated rhodium layer (0.1–0.3 microns) Scratch-resistant, ultra-bright, long-lasting
Anti-Tarnish Silver Alloys (Argentium) Germanium reduces sulfur reaction Naturally tarnish-resistant, no coating needed
Benzotriazole (BTA) Passivation Chemical dip forms a protective molecular layer Extends shine between cleanings

3.3 Testing Tarnish Resistance

  • Salt Spray Test (ASTM B117) – Simulates years of wear in 24–48 hours.

  • Sulfur Chamber Test – Accelerates tarnish formation for quality checks.

4. Water-Resistant Jewelry

4.1 Why Water Resistance Matters

  • Daily Wear: Showers, swimming, and handwashing can damage jewelry.

  • Dlouhověkost: Prevents corrosion and loosening of gemstone settings.

4.2 JINGYING’s Waterproofing Techniques

✔ Laserové svařování – Ensures secure seams (no solder weak points).
✔ Waterproof Sealants – Silicone-based coatings for added protection.
✔ Enhanced Prong Settings – Prevents gemstones from loosening in water.

4.3 Water Resistance Testing

  • Immersion Test – Submersion in water for 24 hours to check for damage.

  • Steam Test – Exposes jewelry to high humidity.

5. Kontrola kvality & Certification

5.1 JINGYING’s QC Process

  1. Material Inspection – XRF testing for metal purity.

  2. Surface Check – Microscope inspection for polishing defects.

  3. Coating Adhesion Test – Tape peel-off (ASTM D3359).

  4. Wear Simulation – Taber abrasion test for scratch resistance.

5.2 Certifikace

  • ISO 9001 – Quality management compliance.

  • SGS/RoHS Reports – Nickel-free verification.

6. Why Choose JINGYING OEM Jewelry?

✅ 100% Nickel-Free Guarantee – Safe for sensitive skin.
✅ Premium Polish & Finishes – Mirror, satin, Matte, or textured.
✅ Long-Lasting Protection – Advanced tarnish & water resistance.
✅ Custom OEM Services – From CAD design to mass production.

Závěr

JINGYING combines advanced metallurgy, precision polishing, a protective coatings to deliver vysoce kvalitní, nickel-free silver jewelry that resists tarnishing and water damage. Whether for fashion brands, maloobchodníci, or private labels, our OEM services ensure durable, hypoallergenic, and stunning jewelry that meets global standards.

Interested in a quote or samples? Contact JINGYING today!