Use of heat is necessary for results

Two women sitting casually on a sofa playing cards wearing ONC NATURALCOLORS Thermal Heat Cap for heat-activated ONC NATURALCOLORS hair color dye

As ONC NATURALCOLORS do not contain chemicals to open your hair cuticles. After the color mix is on your hair. Use medium heat from our Heat Cap or a hair dryer. This opens the cuticles so the color can go into your hair. Only use heat on the roots or regrowth hair. The Heat Cap is healthiest. As it opens the cuticles using trapped heat from your head. It also prevents overheating, which dries hair out. Don't forget - USE HEAT!
Men do no need to use heat. Apply. Wait 30 minutes for full gray coverage. Or 15-20 minutes for a 'salt and pepper' look. Rinse.

The ONC Heat Cap holds body heat and helps to open the hair cuticles to let color in. Its use does not ensure color results.