I tested several different types of masks for air flow, water absorption, water resistance & water leakage. I also tested a large sized plastic freezer bag for the same.
The masks tested included KN95, medical & 5 cloth material masks.
The airflow testing involved putting on the masks and blowing hard towards a single piece of kleenex tissue 2, 6, 12 & 18 inches in front of me. With the KN95, medical masks & freezer bag there was no visible movement of the kleenex from any distance when blowing hard. With the cloth masks there was very little to no visible movement of the tissue. Without the masks the tissue was moved easily even just by blowing lightly.
The water leakage test was performed by filling the masks with some cold water from the bathroom tap. The KN95 & medical masks leaked no water & remained dry on the opposite side. The 5 cloth masks, as you'ld expect, leaked much water, some a drop at a time & others more like a stream. After a brief time the remaining pools of water were emptied from these 5, the masks had absorbed much of the water, making them soaked for hours & leaking had ceased.
The next test sprayed water for several seconds into one side of 4 masks & the freezer bag i held with the other hand. Water did not visibly spray through any of these materials. Instead they all blocked the spraying water. The vast majority of water fell into the sink. The 2 cloth masks, as one would expect, became somewhat soaked & wet on the opposite side. The freezer bag, KN95 & medical masks retained many small drops of water on the sprayed side. On the opposite side they were dry.
The masks tested included KN95, medical & 5 cloth material masks.
The airflow testing involved putting on the masks and blowing hard towards a single piece of kleenex tissue 2, 6, 12 & 18 inches in front of me. With the KN95, medical masks & freezer bag there was no visible movement of the kleenex from any distance when blowing hard. With the cloth masks there was very little to no visible movement of the tissue. Without the masks the tissue was moved easily even just by blowing lightly.
The water leakage test was performed by filling the masks with some cold water from the bathroom tap. The KN95 & medical masks leaked no water & remained dry on the opposite side. The 5 cloth masks, as you'ld expect, leaked much water, some a drop at a time & others more like a stream. After a brief time the remaining pools of water were emptied from these 5, the masks had absorbed much of the water, making them soaked for hours & leaking had ceased.
The next test sprayed water for several seconds into one side of 4 masks & the freezer bag i held with the other hand. Water did not visibly spray through any of these materials. Instead they all blocked the spraying water. The vast majority of water fell into the sink. The 2 cloth masks, as one would expect, became somewhat soaked & wet on the opposite side. The freezer bag, KN95 & medical masks retained many small drops of water on the sprayed side. On the opposite side they were dry.
