Bend the clasped zipper half-and-half a seamy side upwards and pull for textile tape in the different parties. If the zipper misses, it is a defective product.
2. Fixation of a slider on a part.
To check up a zipper on spontaneous unfastening it is simple: pull for the ends of a textile tape near slider (at directed downwards puller) - the zipper should not be unfastened.
3. Slider
The surface of a slider should not be painted, since at sterilization the paint can be showered, and the surface of a slider can start to rust.
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