How to identify the quality of hardware buttons?

In general, color fastness to rubbing; Uniform shape; Button body smooth, smooth cavity; Fine workmanship, such buttons are good quality buttons. Of course, different data made buttons (such as resin buttons, shell buttons, etc.). There are different standards to distinguish the quality of buttons. So is there any way to tell?

1. Control sample or confirmation sample. Whether the type is consistent with the sample

2. The button surface should not have cracks, notches, scratches are obviously uneven

3, face back no car crack, foam; No rotten edge, uneven thickness

4. No obvious deformation, white eyes, white circles and other phenomena

5. Buttonholes should be bright and smooth; Needle eyes should be symmetrical, not big eyes. If it is a dark eye buckle, the dark eye groove should be smooth. There was no apparent burst.

6. After electroplating or other process treatment, the effect should be uniform. If some special effects are inconsistent, they can be packaged separately.

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