This type of hair dye offers a long-lasting color change, typically requiring reapplication only when new hair growth becomes visible. It utilizes a liquid formula containing oxidizing agents that penetrate the hair shaft, depositing color molecules within its structure. An example is a product that transforms naturally brown hair to a vibrant, lasting red.
The enduring nature of this coloration method provides a convenient solution for those seeking a consistent look without frequent touch-ups. This longevity can also translate to cost-effectiveness over time. Historically, the development of such long-lasting dyes marked a significant advancement in cosmetic chemistry, offering a wider range of color options and improved durability compared to earlier temporary solutions.
