The disadvantages of hard water washing: with high calcium and magnesium ions of hard water and soap to wash clothes, soap, 30% of ingredients by calcium and magnesium ions and hard water consumption. And combining the generated after the calcium and magnesium soap, is a kind of viscous substance does not dissolve in water, easily contaminated clothing, and it is difficult to remove, if remain on the clothes will make clothings extensive white, yellow, brittle. So hard water is not suitable for washing clothes. Want to use demineralized water equipment treated water washing is best.