people now pay more attention on the appearance and performance of jewelry. at present most of the metal jewelry in the market have a series of quality problems, such as the chain break, the ear post slip off, the metal rusted or turned dark after worn a period of time.
no. | items | testing methods | regulation & standard |
1 | appearance quality | workmanship/defects | in-house method or buyer’s method |
2 | dimensions | in-house method or buyer’s method | |
3 | weight | in-house method or buyer’s method | |
4 | strength performance | tensile test | in-house method or buyer’s method |
5 | compression dent test (hollowware items only) | in-house method or buyer’s method | |
6 | setting strength test | in-house method or buyer’s method | |
7 | earring (hook bendstrength) | in-house method or buyer’s method | |
8 | earring post backing (earrings only) | in-house method or buyer’s method | |
9 | earring snap bar open / closure force (earrings only) | in-house method or buyer’s method | |
10 | bending strength (pendant/brooches only) | in-house method or buyer’s method | |
11 | attachment strength | in-house method or buyer’s method | |
12 | compression test - ring collapse (rings only) | in-house method or buyer’s method | |
13 | anti-corrosion | decolorization test of sulfide | qj 484or in-house method |
14 | salt spray (fog) test | en 60068-2-11 en 60512-11-6 gb/t 2423.17 qb/t 3826 qb/t 3827 qb/t 3828 gb/t 1771 iso 9227 astm b368 astm b117 | |
15 | tarnish resistance (perspiration soak method ) | in-house method or buyer’s method | |
16 | heat exposure | in-house method or buyer’s method | |
17 | effects of humidity | in-house method or buyer’s method |
accurate and clear label information is extremely important for the product traceability, use and identification.
label assessment such as:
no. | items | testing methods | regulation & standard |
1 | country of origin marking | 19cfr 134 | 19cfr 134 |
2 | tracking labels (for children’s products) | cpsia | cpsia |
