Toner for bleached hair, a hair care product used as an adjective, neutralizes unwanted tones after bleaching, aiming to correct brassiness or yellowness. An example of its usage is "Apply a purple toner to bleached hair to neutralize yellow tones."
Relevant since the rise of hair bleaching, toners offer benefits such as eliminating brassiness, enhancing hair color vibrancy, and adding depth and dimension. Historically, pre-packaged toners emerged in the late 19th century to address the challenges of brassiness.