Is 10 developer bleach

Yes, 10 developer refers to a specific volume of hydrogen peroxide used in hair bleaching and coloring. It contains 3% hydrogen peroxide and is typically used for deposit-only color or for very minimal lifting. It's not strong enough for significant lightening but can be used to gently enhance color or for toning. For more dramatic lifting, higher volumes of developer, such as 20, 30, or 40, are usually recommended.