About the dirt on our clothes

There are many kinds of dirt exsit in our clothes, including sweat, sebum, they are not easy to clean after soured. There are three kinds of dirt, such as water-soluble, oil-soluble, and insoluble dirts.

Water-soluble dirts

sweat, urine, blood, sauce, juice

Oil-soluble dirts

sebum, lipstick, all kinds of oil

Insoluble dirts

sand, mud, charcoal, clay, dust

Water-soluble dirts can be cleaned by water, oil-soluble dirts can be melt by oil. It is necessary to use detergent to wash clothes, because all kinds of dirts including oil-soluble, water-soluble, insoluble dirts, stick to the clothes.