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J & L fashion Jewelry and accessories supplier
J & L fashion Jewelry and accessories supplier
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J & L fashion Jewelry and accessories supplier Quality Info

J & L fashion Jewelry and accessories supplier

We always keep using advanced equipment to insure the product quality. There are different QC working in different production stages to avoiding the product blemish such as scratch ,brilliance etc.. As a result of our high quality products and outstanding customer services, we have gained a global sales network reaching the America, European, Asia Australia, the Netherlands, Germany, Sweden and so on.

 

 

Test we do:

 

-Reliability test 

 

1. Tension force test(for necklaces): spec.: 10 – 20 lbs.

2. Salt Spraying testing: test condition: temperature: 35±2°C, humidity > 85%, PH value: 6.5-7.2, solution: 5%±1% NaCl solution, test time: 24h. The surface of metal should no obvious rust, discolor, peel off etc defects.

3. Bleeding test: take the stone into high temperature oven at 60°C 30 minutes, then use white fabric dip alcohol to wipe the heated stone, there shouldn’t have color bleeding dye on the fabric.

4. UV testing: plating/e-coating: test 60h at 60°C, the color level should ≥4.0.

Stone: test 8h at 60°C, the color level should ≥3.0.

5. Vibration grinding test (metal that surface be treatment): test 0.5h, no bulk peeling off be found at flat area, it is accept if the abrasion be found around edges.

 

Chemical test requirments:

 

1.Substrate materials and electroplating materials will be sent to the 3rd party for Material composition test within every 6 months.

 

2. Lead content: material≤100ppm, coating≤90ppm

 

3.Cd content: material & coating≤300ppm

 

4. Release of Ni content:in all post assemblies which are inserted into pierced ears and other pierced parts of the human body, the rate of Ni release should ≤0.2μg/cm2/week;

in products intended to come into direct and prolonged contact with the skin should≤0.5μg/cm2/week;

Measurement uncertainty assessment of limit according to EN1811: 2011(E)

 

 

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