Hair Type 1
Hair Type 1 hair that is straight and has little to no natural curl, should wash their hair every other day. It is not necessary to wash the hair every day because most shampoos contain sulfates that can dry out hair causing it to become brittle.
Hair Type 2
Type 2 hair, is characterized as wavy hair. It is in between straight and curly, and has a very loose curl pattern. Women with this hair type should also wash the hair 2-3 times a week.
Hair Type 3
Type 3 hair is curly hair and generally has an S-pattern curl. Individuals with this hair type should wash their hair 1-2 times a week.
Hair Type 4
Type 4 hair is characterized as kinky hair, or curly hair with a tight coil. The coil can resemble an S or Z formation. This hair type is very fragile because the sebum that is produced on the scalp does not travel down the hair shaft as fast as Type 1 and 2 hair. Type 4 hair should only be washed once a week or maybe once every two weeks.