How Hair Bleach Works
Hair bleach consists of two different products that are mixed before use:
Bleach powder: This consists of lighteners, thickeners, and alkalizing agents, among other compounds.
Developer: A solution of hydrogen peroxide.
It’s worth noting that both the powder itself and the developer are lighteners, but it’s the combination that is particularly special because combining them allows for two vital functions:
The powder becomes moist, making chemical reactions occur more readily.
The alkalizing agents activate the developer, causing it to start oxidizing whatever it contacts.
This whole process becomes even more ingenious when you consider how it affects your hair’s structure though. Plain hydrogen peroxide can lighten hair on its own, but the effect is surprisingly mild. This is because it isn’t able to penetrate the hair very effectively due to the cuticles of the hair shaft sealing it against environmental stressors.