Coloring Shampoo Dark Grey to Black

To color shampoo a dark grey to black shade, you can use water-soluble black color powder. These color powders are highly concentrated, so you should start with a very small amount.

How to Mix:

1. Start by adding a tiny amount of the black color powder to your shampoo base.
2. Mix thoroughly to disperse the color evenly.
3. Check the color. If you need a darker shade, add another very small amount of color powder and mix again.
4. Repeat this process, adding color little by little and mixing, until you achieve the desired dark grey to black color.

Since the color is very concentrated, a small amount can color a large volume of shampoo. It is always easier to add more color than to remove it if you add too much initially.

Relevant products include Black Color Powder (Water-Soluble) and Brilliant Black BN (CI 28440) (Water-Soluble).