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 1. Aluminum foil surface for surface rolling, should level off, smooth, clean, does not allow to have the corrosion, hollow, crushing, brown staining, sewing, influence of open scratch the defects of use, according to the national standard production; Surface texture uniform,;
2. Packet head curled face should be clean and tidy, can not have serious burr, wrong layer, arrows, a pyramid, knock against injury etc effect use of the defect, coil inside without connectors.
3. Aluminum paper may not appear insects and all kinds of other bodies garbage dirt; (volume packaging not included in the core of light)
4. The chemical properties and the mechanical properties of the products comply with relevant national standards; Ensure that extended performance is good;