This was my first henna and since then my hair is redder but still dark.
I had chemically treated black hair, by accident. My hair right now is dark brown with red highlights.
My mix was 4 ounces Ancient Sunrise henna A mildly acidic liquid Water to make a workable paste
I put the mix in a gallon size zip lock bag overnight on my counter. I then went into the shower and cut the corner of the bag and used it this way. I put a shower cap over it then a towel and let it sit for 4 1/2 hours. It was so very easy to wash out. I loved the natural smell to me it was like Sandlewood. Since these pix I have hennaed my hair three times.