Water ions and negative ions are produced by different principles and have different effects on hair care. 1. Negative ion hair care is through the negative ion generator to release a large number of electrons, electrons and oxygen molecules in the air combined to form negative ions, negative ions can help neutralise hair static electricity, smooth hair frizz, close the hair scales to effectively reduce hair splitting; 2. Water ion hair care can help reduce static electricity, but also replenish hair moisture, so that hair is smooth and shiny. It also helps to improve the dryness of the scalp and protect the health of the scalp.