The Surprising Impact of Drying Methods on Natural Hair Dyes

Posted by Yuki Katakami on

Understanding the Impact of Drying Methods on Natural Hair Colors with Indigo
Indigo is a key ingredient in many additive-free natural hair colors, particularly those that create brown-like shades. Dark colors such as Soft Black and Dark Brown often contain a significant amount of indigo. An important consideration when using these natural hair colors is the drying method, as it can greatly affect the final result.

When you dry your hair with a hair dryer immediately after dyeing with indigo-rich natural hair colors, the blue hue of the indigo is halted. This shift increases the prominence of orange tones, like those from henna, making it impossible to achieve the desired dark color. We conducted a comparison to demonstrate this effect, using samples dyed with Soft Black and Light Brown.

[100% Organic Hair Dye: Soft Black]

Dark Brown hair dye kit
[100% Organic Hair Dye: Light Brown]
Light Brown Hair dye kit
First, we prepared gray hair samples and dyed them with both Soft Black and Light Brown. One set was force-dried with a hair dryer, while the other set was allowed to dry naturally with a towel wrapped around the hair. The results were striking.
[Soft Black: Blow drying vs Air drying (1 hour after dyeing)]
SoftBlack: Blow drying vs Air drying (1 hour after dyeing)
[Light Brown: Blow drying vs Air drying (1 hour after dyeing)]
Light Brown: Blow drying vs Air drying (1 hour after dyeing)
Immediately after dyeing, the sample dried with a hair dryer turned orange because the indigo color development was interrupted. This happens because the pigment in indigo oxidizes and develops its color in a humid state.

After 72 hours, the hair sample that was force-dried with a hair dryer remained orange, as the color development process had been stopped. Even with Light Brown, which contains less indigo, the impact was immediately visible.
[Soft Black: Blow drying vs Air drying (72 hour after dyeing)]
Soft Black: Blow drying vs Air drying (72 hour after dyeing)
[Light Brown: Blow drying vs Air drying (72 hour after dyeing)]
Light Brown: Blow drying vs Air drying (72 hour after dyeing)
Indigo oxidizes slowly over three days, changing from green to blue. If there is moisture in the hair, the color will continue to develop and change. Therefore, to achieve the best results, we recommend air-drying your hair slowly by wrapping it in a towel.
hair towel
By understanding how drying methods affect natural hair colors with indigo, you can ensure that you achieve the rich, dark shades you desire.

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