1.Put the paper flat on the tray of the centrifuge where the shoes are placed. The sample shoes are firmly fixed in the tray. Then a certain depth of water is added to the interior of the shoes and the machine is started.

2.The tray rotates on a centrifuge with a vertical axis from slow to medium speed until it rotates at a high speed. The water in the water shoe then exerts a certain pressure on the inside of the shoe. This pressure is much larger than that of a person's feet. The pressure of the upper material is far greater than some conventional tests at present;

3.The pressure generated by the ^ace bubble water" detection time is generally 30-60 minutes. After the waterproof test is completed, the centrifuge is opened to remove the sample.

4.If the shoes leak, the paper on the tray will be wet. At the same time, the transparent acrylic around the centrifuge will also have obvious drops of water. Finally, the water in the shoes will be poured out, dried with a dryer, and finally anatomically sampled. Look for the cause of water leakage and improve it.