While many plants, flowers, spices, and barks can be used in organic hair dyeing, the foundation of plant-based coloring relies mainly on two key dye plants: henna and indigo.
Henna contains warm undertones, ranging from light yellow to deep red, whereas indigo has cool undertones, ranging from green to blue. By blending henna and indigo, you can create a wide spectrum of brown shades, from the lightest chestnut to the darkest brown.
Henna can also be used on its own, but only if you’re aiming for a very warm and intense result: Venetian blondes, vibrant coppers, and rich reds reveal their full potential when henna is used in its pure form.
However, it’s important to note that indigo must always be combined with henna, and for a simple reason: henna binds to the hair fiber, making the color long-lasting. Indigo, on the other hand, adheres to the henna, which acts as the anchor in natural coloring. Used alone, indigo tends to slide off the hair and carries a high risk of unwanted tones or color instability.
To achieve optimal white hair coverage, outside of special cases, we recommend using a blend of dye powders composed of approximately 40% henna and 60% indigo for a single application. This ratio effectively covers white hair without creating a result that’s too warm or overly intense.
When working with the double application method, the usual approach is as follows:
The pre-pigmentation step uses pure henna, which provides excellent coverage and evens out the entire hair surface. After rinsing, the base tone will be very intense (yellow, orange, or red), don’t worry, that’s completely normal!
The second color application, made from either pure indigo or a blend of henna and indigo (depending on the desired result), will then define the final shade of the hair.
Depending on your client’s natural hair base, the target color, and the Hairborist plant pigments you choose, it’s possible to achieve a wide variety of beautiful tones and shades. There’s no doubt your client will be thrilled with the results of this tailor-made coloring method.