In 1910 she incorporated her company. She could not attract big investors so she used $10,000 of her own money to start her school and factory in Indianapolis. She was the sole shareholder of the Madame C.J. Walker Manufacturing Company. Sarah Walker was a serious business women. She began mixing herbs and shampoos. Her products where especially for black women. In a short time she had trained 40,000 salespeople, her "Walker Agents". Her agents learned her system of vegetable shampoos, witch hazel, cold creams and diets. She didn't invent the hot comb, for straightening hair. But she improved it with wider teeth just for black women's hair. 