Here's what will happen:
* Lighter Shades: On gray hair, peroxide will lighten the hair. The extent of the lightening depends on the strength of the peroxide solution and how long it's left on the hair.
* Yellow or Brassy Tones: Peroxide often lifts the hair's natural pigment, which can reveal underlying yellow or brassy tones. This is especially common with gray hair because gray hair can still have underlying pigments.
* No Color Addition: Peroxide is a bleaching agent, not a dye. It removes color, but doesn't deposit it.
Therefore, peroxide will likely make gray hair lighter and potentially more yellow or brassy, but it won't directly "turn" it a specific color.
Important Considerations:
* Damage: Peroxide can damage hair, especially if used improperly or too frequently. It can make the hair dry, brittle, and prone to breakage.
* Toner: If you want to achieve a specific color after using peroxide, you'll need to use a toner or hair dye. Toner neutralizes unwanted tones (like yellow) and adds the desired shade.
* Professional Advice: If you're unsure about using peroxide on your hair, it's best to consult a professional hairstylist. They can assess your hair's condition and recommend the best approach to achieve your desired results while minimizing damage.