Human evolution. Human evolution is the lengthy process of change by which people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years.
After rinsing out your color, apply the conditioner supplied with your kit but don't wash your hair. Wait at least a full day, preferably 48 hours, after coloring your hair before you wash it. This will also allow the hair color to completely penetrate your hair shaft. About four to six weeks after coloring your hair, you may need to touch-up your roots. When touching up the roots, don't over-color the ends. Apply conditioner to your ends and then just color the roots and top.
Wait Before You Wash: You shouldn't wash your hair for three or four days after getting the treatment. That's because the solution takes time to work, he says. Upkeep: After you get a keratin hair treatment, and after the don't-wash waiting period, you should use sodium-sulfate-free shampoo to help maintain the treatment. How Long It Lasts: Expect the results to last two to 2 1/2 months. Keratin treatments won't make your hair break, but the flat-ironing might. The hair breakage has nothing to do with the treatments and everything to do with the flat irons that are used to dry and seal the hair afterward, says New York dermatologist Neil Sadick, MD.