The time that a person should leave peroxide in their hair when trying to lighten the color will range from five minutes to one hour. The time will vary based on how drastic a person wants the color of their hair to change.
When using peroxide or bleach to lighten hair it is important for a person to wear gloves because the chemicals used in the peroxide are very strong and can damage the skin. It is important to not leave peroxide or bleach on the hair for too long because it can damage the hair and cause breakage. Peroxide is commonly used to lighten the color of a person's hair at their own home.