Using the 2 step process to cover white hair which I have had since a teenager - I was really desperate to move away from box dyes especially re dark colours. I added lemon and coffee to the henna when prepping it and salt to the indigo. It is very effective and works out to be cost efficient too. The dyes are VERY powerful so I didn't need the whole packet of either. Also - mega bonus - they did not stain the bathtub! Other henna/indigo products have and were really hard to clean up. Basically - I am really pleased with the quality and the very helpful instructions included. I will certainly return for future purchases.
I use this product for more than 2 years and I am perfectly happy. Not only it 100% covers grey hair, but it also makes them shine and look healthier. The combination 2 indigo/1 henna matches my natural dark hair color
Really recommend this product. I have naturally really dark hair and this covers the greys (or whites in my case!) I find I get the best result when I first use the henna alone and then dye with the indigo powder.