Bleaching hair at home is one way to lighten your hair from its natural colour. Bleaching hair uses a bleach powder and peroxide developer, also called cream developer. The developer comes in 20-, 30- and 40-volume strengths. However, bleaching hair is a difficult process, and professional stylists do not recommend bleaching your hair at home because of the high likelihood that something could go wrong. Use caution if you want to bleach your hair at home.
Apply a deep conditioning treatment to your hair the day before you plan to bleach it. Pre-conditioning your hair may minimise some of the damage from the bleaching process.
Mix the hair bleach with 30-volume peroxide cream developer in the plastic bowl according to the directions on the bleach.
Separate your hair into strands a couple inches wide. Apply the bleach to your hair, beginning with the middle lengths of your hair, using the brush. Start applying bleach about 1/2 inch from your scalp and work quickly through to the ends. Use your fingers to apply bleach to the hair near your scalp last, as bleach works more quickly there.
Check the progress of the bleach frequently. Using 30-volume developer means that the bleach will work faster. Because 30-volume developer is also more likely to damage your hair, you want to leave it on your hair for the shortest possible time necessary. Leave bleach on hair for up to 30 minutes.
Rinse bleach from your hair when the colour reaches your desired level of lightness. If your hair is naturally dark, the shade may seem orange; if so, this means you need to apply toner. Work the toner through your hair using your fingers, allow it to set on hair for up to 10 minutes and rinse.
Use a 20-volume developer for a longer period of time to minimise the damage to your hair's condition. Put a thin layer of petroleum jelly around your hairline so that you don't burn your skin with the bleach. Consider using an optional colour gloss after bleaching to get your hair to the desired shade of blonde.
Apply bleach near a sink so you can rinse out the bleach as soon as it's ready.