1.The color of the products is argent grey metallic shine, smooth, unknit. They mustn't be oxydic badly, lacking of sintering, over heating, delamination and cracking.

1.产品表面呈金属光泽、光滑、平整、不得有严重氧化现象，不得有欠、、鼓泡、分层、裂纹等缺陷。