I'm a natural blonde, but I've have been dyeing my hair dark brown for years. How can I go back to blonde without damaging my hair?
If you want get back to your natural color, you need patience and a good colorist who is known for this type of correction. When you do any hair color that deposits pigments darker or redder than your own natural you accumulate many layers of colors that need to be removed. Your colorist should start with a sulfur-based remover that lifts artificial dye molecules. Then, you can begin bleaching the hair. Keep in mind that the first time you lighten your hair, it will turn out a coppery color. This is when you need patience. Give your hair a few weeks before you attempt another bleaching process. To determine if your hair is strong enough, pull on a wet strand. If it breaks easily then you need to wait two or three more months before the next bleaching process. In the meantime, build up your hairs strength with weekly protein treatments. If your hair doesn't break easily than you can attempt to highlight or bleach hair again. Repeat until you achieve your desired shade.