The distinction between lasting and temporary hair coloration lies in the chemical processes involved and their effects on the hair shaft. Lasting color utilizes ammonia and peroxide to lift the hair cuticle and deposit color molecules deep within the cortex, resulting in a change that grows out with the hair. Temporary color, conversely, coats the hair shaft with color molecules without significantly penetrating the cuticle. This results in a color change that gradually washes away with repeated shampoos.
Understanding the differences between these two types of hair coloring is essential for achieving desired results and maintaining healthy hair. Choosing the right type depends on factors like desired longevity, natural hair color, and the level of commitment one is willing to make. Historically, options were limited, but advancements in cosmetic chemistry have expanded the range of available colors and formulations, providing consumers with more control over their appearance and offering solutions for diverse needs and preferences.