Common Outcomes & Processes:
* Lifting/Bleaching is Required: Brunette hair contains a lot of red and orange underlying pigment. To achieve blonde, you need to lift the natural color out of the hair shaft. This usually involves using a bleaching agent (developer and lightener powder) that opens the hair cuticle and oxidizes the melanin (the pigment that gives hair its color).
* Hair Damage: Bleaching is damaging to the hair, as it weakens the hair shaft. The more levels of lift required, the more damage there will be. This can lead to dryness, breakage, split ends, and a change in hair texture.
* Brassy or Orange Tones: If the hair isn't lifted enough, or if the lifting process isn't done correctly, the underlying warm tones (orange, red, yellow) can become very prominent. This results in "brassy" blonde.
* Multiple Sessions: Going from very dark brown to very light blonde often requires multiple salon sessions spaced several weeks apart. This allows the hair to recover somewhat between treatments and minimizes damage.
* Toner: After bleaching, a toner is usually applied. Toners deposit pigment to neutralize unwanted warm tones (like brassiness) and create the desired blonde shade. They can add ashy, cool, or neutral tones.
* Uneven Results: Uneven application of bleach, using the wrong developer strength, or having hair that's been previously chemically treated can lead to patchy or uneven blonde.
* Color Correction: If the results are undesirable (too brassy, uneven, too damaged), color correction might be needed. This is a more complex process that involves adjusting the color to achieve a more even and desirable result.
* Potential for Hair Breakage or Chemical Cut-Off: If over-processed or damaged, hair can become extremely fragile and prone to breakage. In severe cases, the hair can even break off at the root (chemical cut-off).
Factors Influencing the Outcome:
* Starting Hair Color: The darker the natural hair color, the harder it is to achieve a light blonde.
* Desired Shade of Blonde: A subtle, honey blonde is easier to achieve than platinum blonde.
* Hair Condition: Healthy, virgin hair will lift better and sustain less damage than hair that's already been chemically treated.
* Products Used: High-quality bleach, developer, and toners can help minimize damage and improve the final result.
* Skill of the Colorist: A skilled and experienced colorist can assess the hair's condition, choose the appropriate products, and apply them correctly to achieve the desired blonde while minimizing damage. At home bleaching can lead to major issues if not done right.
Here's a simplified breakdown:
1. Bleach: The brunette applies bleach to their hair.
2. Lifting: The bleach lifts the natural hair color.
3. Warm Tones: Underlying warm tones are revealed (orange, red, yellow).
4. Toner: Toner is applied to neutralize unwanted warm tones.
5. Final Result: Ideally, the hair is blonde, but it may be brassy, damaged, or uneven depending on the factors mentioned above.
In conclusion, dyeing brunette hair blonde is a significant chemical process that carries risks. It's generally recommended to consult with a professional colorist to ensure the best possible outcome and minimize damage. At-home bleaching can lead to unintended and undesirable results if not done properly.