Here's a breakdown of why:
* Underlying Pigment: Reddish-brown hair contains a lot of warm pigment molecules, including red and orange. Bleach lifts these pigments in stages. Lighter pigments like yellow are usually the last to be lifted.
* Bleach Strength and Processing Time: Even if the bleach is strong and you process it for a long time, you are still more likely to get orange results than blonde.
* Hair Condition: If your hair is damaged, it won't lift as easily.
What to Expect with One Bleach:
* Most Likely: Orange to orange-yellow tones.
* Less Likely: A very brassy, warm blonde.
* Almost Impossible: A true, cool-toned blonde.
How to Get Blonde from Reddish-Brown (Safely):
1. Assess Your Hair: Is it healthy? Damaged hair will break easily during bleaching.
2. Multiple Sessions: It will likely take several bleaching sessions, spaced weeks or even months apart, to gradually lift the pigment without causing excessive damage.
3. Toning: After each bleaching session, you'll need to use a toner to neutralize the unwanted orange or yellow tones and get closer to your desired blonde shade.
4. Professional Help: The safest and most effective way to get blonde from reddish-brown hair is to go to a professional hairstylist. They can assess your hair, choose the right products, and minimize damage.
Important Considerations:
* Hair Damage: Bleaching is damaging to hair. Over-processing can lead to breakage, dryness, and split ends.
* Strand Test: Always do a strand test before bleaching your entire head to see how your hair reacts to the bleach and how much it lifts.
* Aftercare: Use moisturizing and protein-rich products after bleaching to help repair and strengthen your hair.
In summary, one bleaching session on reddish light brown hair is likely to result in orange or orange-yellow tones. Achieving blonde requires multiple sessions, proper toning, and careful attention to hair health. It is always recommended to consult a professional hairstylist for the best and safest results.