The horse tail hair manufactured by our factory has been scoured, clean and washed and has undergone a sterilization treatment .The sterilization treatment is specified as follows:

1. After the horse tail hair has been cut, they were thoroughly washed with soap and warm water containing 2.5 percent sodium carbonate in a washing machine .in a washing machine for 3 hours.

2. They stood for.sodium carbonate then they were taken out after one hour.

3. The tails were then boiled in water at temperature of 100℃ for over 2 hours, and they were taken out and allowed to dry. After being combed, they were tied with string into bundles manually.