A cosmetic product designed to neutralize unwanted yellow or brassy tones in light-colored hair. Typically applied after lightening or bleaching processes, it deposits violet or blue pigments onto the hair shaft. This counteracts the warm hues, resulting in a cooler, more platinum or ashy shade. For example, individuals with naturally blonde hair or those who have lightened their hair to a blonde shade might use this product to achieve a specific tone.
This type of product is crucial for maintaining the desired color and appearance of blonde hair. It helps to extend the lifespan of salon color treatments and prevent the development of undesirable warmth. Its use can be traced back to the increasing popularity of blonde hair coloring and the demand for cooler, more modern shades in the latter half of the 20th century, evolving alongside advancements in hair coloring technology. Regular application can significantly enhance the overall aesthetics of blonde hairstyles.