I used one small teaspoon to subdue the copper hints in my favourite mix of 1.5 parts natural brown and 1 part chestnut for my roots ( 1.5 hours with last 10 minutes spreading to full hair). The results are great and Iím starting to get some streaks showing too. Iím happy!
I followed the 2 step process. The indigo did cover my greys but the colour starts to fade after few washes. I repeated the process twice and it does seem to become darker every time I use it. I only did a strand test. But will definitely buy the product again.