The water in the factory is generally acceptable, but after a long city water supply pipeline and a residential tower, often there will be some two pollution substances, such as: bacteria, virus, molecular colloid, dust, or sediment, eggs and so on, in addition to sediment and bloodworms, visible, the other two objects are often invisible to the naked eye, after suitable source is accurate to 0.05 microns after ultrafiltration, all two pollutants can be removed, then how can we get? We can use a simple experiment to see the differences before and after the ingenious ultrafiltration: two the same high quality transparent glass, are respectively connected with the water outlet of the water and tap water outlet, with LED white flashlight observed from different angles in two cup of water of different.1. in the light of visible two cups of water, no difference between the 2 turn off the lights from the right, irradiation, can see: the left front water ultrafiltration is marked with " light ", the ultrafiltration of water almost invisible " light " 3 turn off the lights, from the left side of irradiation, still can see: the left front water ultrafiltration is marked with " light ", the ultrafiltration of water almost invisible " light path ". This is the impurities in the water content on the reflection of light and refraction caused by different!