From three points, we can see the quality of injection parts.
First, look at the appearance
Seewhetherthe injection parts are complete and whether they are deformed or not;
Whether the injection parts are uniform in color, whether there is obvious color difference, and whether the color is bright and translucent.
Second, touch the product
Touch the the surface of the injection part to see whether smooth, and whether there are burrs around the handle;
Whether theinjection parts have been naturally aged, the aging is reflected in […]