Purple shampoo helps keep these warmer undertones at bay, extending the time between salon appointments for toner touch-ups. However, over time, the toner can fade, and the raw undertones may reappear, resulting in brassy or dull-looking hair. Colorists adjust this using a toner, which provides a higher quality, lifted, or lightened hair color. When hair is lightened or bleached, the process brings out raw warmer undertones, such as yellow, orange, and red. While purple shampoo is often associated with toning blonde hair, it's actually a toner extender. It's important to note that individual results may vary, so it's best to start with a small amount of purple shampoo and gradually increase the frequency of use as needed. If you notice your hair becoming overly toned or tinted, simply use a clarifying shampoo to reset your hair. Generally, purple shampoo can be used once or twice a week, depending on how often you wash your hair and the level of toning you want to achieve. Overuse can result in the hair appearing slightly darker instead of brightened. Purple shampoo should be used in moderation and not as a replacement for your regular shampoo. Purple conditioner should be left on the hair longer than purple shampoo to obtain added softness, smoothness, and conditioning. Leaving it on too long may result in the pigment absorbing unevenly, more to the more porous areas, and therefore leaving patchy purple tinted areas in the hair. ![]() The duration depends on how porous (damaged) the hair is and how much the hair needs to be toned. Generally, a purple shampoo only needs to be left on the hair 1-3 minutes. How Long Should You Leave Purple Shampoo In Your Hair? If purple shampoo is left on the hair for too long it can leave hair slightly tinged purple which is easily reversed with a clarifying shampoo. The degree of toning is dependent on how porous or damaged the hair is and the length of time the product is left on the hair. When used at a relatively low level, these purple shampoos do not dye the hair purple but counteract hair yellowing. In purple shampoos you will see this workhorse colorant identified on the label as Violet 2, CI 60730, or Acid Violet 43. ![]() By incorporating purple shampoo into your hair care routine, you can maintain a cool-toned blonde that looks like it was just done at the salon. Purple shampoo is similar to color-correcting makeup in that the violet pigment is complementary to yellow on the color wheel, effectively neutralizing any unwanted warm tones. ![]() It contains a violet pigment that works as a toner to counteract brassy tones and yellowing, which can occur over time. Purple shampoo is an essential tool for anyone with dyed blonde hair looking to keep their locks vibrant and fresh. Naturally blonde hair can also develop brassy tones due to oxidation from solar exposure (referred to as photo yellowing) and repeated thermal stress. When hair is bleached or lightened then toned to icy blonde, white, or silver it can, over time, become too warm-toned or brassy. The concept of purple shampoo stems from color theory, a set of principles to mixing colors and the visual effects of different color combinations. There are many frequently asked questions when it comes to purple shampoo but we are here to provide answers and explore the science behind these violet-toned hair cleansers.
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