Is bleaching your hair a physical or chemical change?

I'm not sure about the biochemistry behind it, but actually dying your hair is a chemical change. Some hair dyes, like those that you brush in hair to turn gray hair brown/black is somewhat a different story. read more

But bleaching hair is most certainly a chemical process. Straightening/curling your hair is a chemical change too which involves breaking a reforming the S-S disulfide bridges between proteins. "Theories are nets cast to catch what we call 'the world': to rationalize, to explain, and to master it. read more

Lead, however, is toxic so I'm almost certain there are alternatives out on the market. But bleaching hair is most certainly a chemical process. Straightening/curling your hair is a chemical change too which involves breaking a reforming the S-S disulfide bridges between proteins. read more

when you bleach your hair it is a chemical change,because you are adding the chemical from the bleach to your hair and "you can't change it back to the old". chemical change: you can't change it back to the old and it makes a new subtance. physical change:it does not make a new subtance and it is still the same object. read more