A color rinse can be done either by using the henna hair dyeing process or using one of many alternative natural hair color recipes. A color rinse differs from a permanent hair dye because a color rinse isn't as permanent and does less damage to the hair.
Henna doesn't actually dye the hair, but instead adds natural keratin and tannins to the hair, giving it a darker tone. To start the henna process, the henna mix should be mixed with lemon juice until the substance has the texture of yogurt. An optional tea decoction should be added to intensify the final color. The henna mix must then sit in a covered bowl in a warm place for 12 hours. This helps the mix cure and be at its most effective once applied to the hair. After pouring the henna mix into a bottle, it can be applied to the hair.
Henna will dye the skin and hair alike, so it is important to make sure a towel is wrapped around the neck and shoulders to protect the skin from coming into contact with the henna. The dye must then be applied freely to the roots of the hair, starting at the top of the head. Working to the tips of the hair, the hair should then be tied up into a tight knot at the top of the head. The process should be repeated, adding henna to each look of hair, working in a circle towards the hairline.
The hair should then be wrapped in a plastic wrap or cap, making sure it is sealed from air. The henna should sit for around 2 to 5 hours. The cap should then be taken off, and the henna should be washed out with cool water and conditioner.