I've been doing henna hair dye now for 13 years, and learned a lot along the way , helping thousands of people get their hair in tip top shape. I love getting feed back from different people and know the myths, and tricks of the trade. I have mixed henna with hundreds of different ingredients. One thing I never learned about was techniques to keep the color in, and keeping it from fading. Most peoples hair is very absorbent, and a few are not. Matter of fact some people are "dye-less", meaning even chemical hair dye will not change the color of their hair. One day a customer "Vanessa" called in to just say thanks for a great product and she wanted to share with me how she applied and I was shocked to learn she had been using our hair color since 2014 and only did her roots once a month.
-boil water and shut off before shower
-wash hair 2x w/shampoo
-wash with 1 cup of apple cider vinegar and let sit for 3 min, rinse out
-mix hot water with powders
-use application brush from hennahut.com to apply and let sit for 1 hour
-rinse till clear
-I do not wash my hair for 2 days after. This helps the darker pigment set and my hair oils to further recoup.