Be sure to use mild laundry detergent gently. Use soap too rough to clean.
It is best to set the water temperature in the range of 30 to 50 degrees, which is too high or too low, and it is not easy to color and clean the finished product.
Before washing the school jacket, you can fill the basin with warm water and soak the clothes for three to five minutes. It should not be too long, because long-term soaking will cause the color to be dyed.
