First of all, it is necessary to fill and mix the material and the mask cloth. Including water absorption, dilution, mask deformation, etc. before and after the test to ensure that the basic selection of the mask cloth is correct; secondly, the classification of different time, temperature, humidity, the amount of ingredients added, the total number of microbial counts, etc. In the end, the face test is performed on different faces, so that the matching test of the mask cloth and the material body is basically completed. Of course, specific analysis of specific issues, welcome to Prius!