Photobleaching is the process that takes place if your hair color lightens due to the effects of sun exposure.
The process can also impact the texture and strength of your hair.
When done without care, trying to lighten your hair can increase your risk of sunburn and skin cancer.
Photo composite by Michela Buttignol for Verywell Health; Getty Images
The sun’s UV rays react with your hair to cause changes in its color and texture.
Changes occur during oxidation as UVA radiation breaks down a small molecule calledmelaninin your hair.
Melanin providespigment, or color, to your hair and skin.
It also acts as “nature’s sunscreen” to absorb and protect hair proteins against UV rays.
However, changing the chemical makeup of melanin also changes its light-absorbing properties.
During photobleaching, UVB radiation causes the degradation and loss of hair protein, especiallykeratin.
Keratin is the primary component of hair, which gives it shine and strength.
The impact of UV radiation on melanin can vary by individual.
Dark hair is more resistant to the effects of photobleaching than light hair.
Getting your hair sunbleached safely requires precautions to avoid the damaging effects of the sun’s ultraviolet rays.
Other side effects of photobleaching your hair are more severe.
Sitting in the sun will gradually lighten your hair over time without extra treatments.
Alone, the citrus acid in lemon juice provides a weak oxidizing effect.
Together, lemon juice and heat degrade the level of melanin, which brightens your hair pigment.
These prepared sprays typically provide faster results by including ingredients such ashydrogen peroxide.
This chemical speeds up the lightening process by opening the hair cuticle and breaking down the melanin during oxidation.
Is Hair Photobleaching Reversible?
Hair photobleaching is not immediately reversible.
So, it’s not possible to “undo” the effects of photobleaching on your existing hair strands.
Photodamaged hair has undergone both physical and chemical changes.
Attempting to correct it yourself by introducing more chemicals may not produce the same results as treating virgin hair.
A hair color professional may be able to better assess your situation and offer the best options.
Photobleaching involves harnessing the natural effects of the sun on your hair.
The process uses alkaline agents to break down the protective layer of hair strands.
It is followed by oxidative agents that penetrate your hair shaft to change melanin molecules.
Texture and Color Damage
Both photobleaching and hair bleach cause damage to your hair fiber.
Factors such as the color and condition of your hair can affect the results you achieve.
However, relying on the sun for hair bleaching can produce inconsistent results.
Without proper protection, it can also increase your risk of sunburn and skin cancer.
Consider your goals and expectations before photobleaching your hair.
The effects are permanent and may require long-term special care to offset extreme results.
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