How to avoid ruining your hair with bleach?
You’ve probably seen those videos where people completely ruin their hair with bleach, right? While bleaching your hair may look easy, doing it incorrectly can cause serious damage, and even breakage. Here’s how to avoid that: Follow these basics to safely achieve your dream hair!
1. Know Your Hair History
Everything starts with what has been done to your hair before. Has it been dyed with permanent color, semi-permanent color, or bleached? Once, or multiple times over the years? The more chemical treatments your hair has gone through, the less it can handle further bleaching.
The shade you’ve used also matters: dark reds or deep blues can be harder to lift to a clean blonde, although this depends heavily on the products and methods used.
If your hair feels dry, brittle, snaps easily, or stretches when dry, proceed with extra caution. When in doubt, always do a strand test: it’s the easiest way to avoid major mistakes on your entire head.
2. Set a Realistic Goal
Not every result is achievable in one bleaching session - or without damage.
Pastel shades ideally require a nearly platinum blonde base (level 10-11), while more intense colors, like fuchsia pink, can work beautifully on slightly darker hair, for example on level 8.
If you’ve had black box dye on a super long hair for years, achieving platinum blonde is not a realistic goal, or at least not without compromising hair length or condition. Warmer shades like red or orange are much more achievable with less aggressive processing.
3. Monitor Processing Time Carefully
Don’t leave bleach on your hair “just in case” for too long. Always monitor your hair during processing. If it starts to feel gummy, overly soft, or fragile, rinse immediately. Don’t push the bleach too far.
4. Choose the Right Developer Strength
The strength of the developer directly affects how aggressively your hair is lightened:
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3% (10 vol) – the most gentle option, ideal for fine hair and already lightened hair
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6% (20 vol) – the most common choice for standard lightening on medium hair
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9% (30 vol) – the strongest option, best for resistant, darker, and untreated hair
For example, fine Nordic hair typically cannot handle a 9% developer well - and it often doesn’t need it due to its natural lightness. Stronger, darker hair types tolerate it better. The key is understanding your own hair type and always doing a strand test if you’re unsure, this gives you the best chance of success!
Remember: patience is your most important tool when bleaching hair. By listening to your hair and proceeding carefully, you can avoid damage—and achieve a result you’ll truly love.
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