Use of heat is necessary for results
As ONC NATURALCOLORS do not contain chemicals to open your hair cuticles. After the colour mix is on your hair.
Use medium heat from a hairdryer or our ONC Thermal Heat Cap. This opens the cuticles so the colour can go into your hair. Only use heat on the roots or regrowth hair. The ONC Thermal 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!
The ONC Thermal Heat Cap holds body heat and helps to open the hair cuticles to let colour in. Its use does not ensure colour results.