Lou Teasdale Hair Interview
How to Bleach Your Hair Without Breaking It
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PS: What's the key to bleaching your hair without it breaking off?
LT: The key, I think, to a good bleach, is to have it done more often. A lot of people try to hold off and get their roots longer because they think they're damaging their hair less. If you want a really nice white bleach, the best thing to do is have it done every four to five weeks. So your roots are only a centimeter, and then your colorist won't have to use a stronger bleach, because right in the root, the heat from your scalp, makes it lift. [This way] you can put a really low percentage [bleach] on. If you have longer roots, you need a higher percentage.
Also, keep the same colorist; find someone who is good and who knows what they did last time so they don't overlap. Overlapping bleach is what will make your hair break. So don't overlap it! If you use the same colorist, they'll do the same pattern in your hair, and eventually your hair will get healthier. Also, what I started doing is highlighting the bulk of my hair and just bleaching my part, to try to get my hair to grow. As little bleach as you can. You can use little tricks like that. Because once your hair is broken off, you can't do much about it. It's gone! So . . . you just gotta style it out.