The duration a purple-pigmented cleansing product remains on hair is a critical factor in achieving the desired color correction. This timeframe directly influences the neutralization of brassy or yellow tones, common in blonde, bleached, or grey hair. An insufficient period may yield negligible results, while excessive exposure can lead to an undesirable lavender hue.
Employing these color-correcting products offers a non-permanent solution for maintaining the vibrancy and desired shade of lightened hair. It circumvents the need for frequent salon visits and helps prolong the life of a color treatment. Historically, the concept of color theory, specifically utilizing opposing colors to neutralize unwanted tones, has been a cornerstone in hair care for decades.