I used Karishma herbal henna powder. I picked it up from my local Indian store. I love the color stain that it left on my grays but I'm going for jet black so I'm following up with indigo. My henna mix was simple. I microwaved some water until it was boiling hot and then I added in the whole bag. I definitely didn't need that much but better more than less. I immediately applied the henna to stretched hair. The application process was simple. I put 2 plastic shower caps on my head and a scarf so that i could leave the henna on while I was at work. About 11 hours later, I washed the henna out with water and now I'm going to bed with the indigo.