Nourishing Formula: The hair-lightening treatment removes your scalp’s natural moisture, so side with a nourishing formula containing argan oil, keratin, avocado oil, vitamin A, amino acids, green tea extracts, and soybean oil. They revive, moisturize, and repair brittle hair. What Katie says: "This is the product I never knew I needed. The Olaplex system is the ultimate product range for protecting and caring for bleached hair. So the idea of a toning shampoo with the Olaplex technology inside is mind-blowingly exciting. It has become a must-have for me, as I use it alongside the rest of the range. I particularly like to use it straight after I've had my colour done when my hair is at its most vulnerable. If you're looking for a product that you can 100% rely on, this is that product." Once a week, lather the shampoo into wet hair using gloves , then allow 2 to 5 minutes for the pigments to work their magic before rinsing . Follow with the conditioner to leave hair looking blonder and feeling s tron g, smooth and soft. Using gloves to avoid staining hands, start by lathering the shampoo evenly through wet hair. Massage from roots to ends to target all brassy tones and avoid patchiness. Leave the shampoo on for up to 2 minutes before rinsing out.

But Zoe Irwin, creative director at John Frieda Salons, advises clients to be careful as purple-based products can be drying. Session stylist Ali Pirzadeh concurs and recommends using your regularconditioner afterwards."I wouldn't bother with a purple conditioner as well, as you want to make sure your hair is still being nourished." What's the difference between toner and purple shampoo? After you've rinsed the blue shampoo out, lather on your favorite hair conditioner to replenish moisture and boost shine. For brunette hair that needs extra toning, you can also double up on the blue toning by following your blue shampoo with a blue conditioner like the AVEDA Blue Malva Color Conditioner. This will further tone your hair while also hydrating your color-treated strands.

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This porousness means bleached hair soaks up unwanted minerals and metals in your tap water and acquires a yellow tinge over time. "It also means that blonde hair absorbs light instead of reflecting it and is more prone to damage," adds Shiel. How to use purple shampoo

Blue shampoo can be used once a week, while blue conditioner can be used twice or thrice a week. Blue Shampoo is used the same way as normal shampoo, except you need to leave it in for 3-5 minutes before rinsing it off so it can penetrate into the hair. The conditioner can be kept on your hair for about 2-10 minutes to effectively neutralize brassy tones. When lightened, color-treated hair is exposed to heat, certain hair products, or environmental factors (like pollution or the sun), you'll eventually start to see the hair color change—most often revealing brassy tones. Grand explains that this happens because "human hair is comprised of color pigments that are usually invisible to the naked eye," but when the hair is colored, all those pigments rush to the surface. For blondes, these underlying pigments tend to have a golden or yellow color, but for brunettes, it's more common for these pigments to have orange, red, or copper tones. Rebekkah is a Master Stylist with over 7 years of experience. She specializes in the most popular colors and balayage and the most extravagant restyles. From managing a busy salon to working internationally with clients on their big days, s... more About the Expert: Lana Grand is a Los Angeles-based celebrity hairstylist and colorist with over 17 years of experience in the beauty industry. Unlike a standard shampoo, in which you likely focus on massaging the roots, be sure to apply blue shampoo as evenly throughout the hair as possible from the ends to the roots. This will ensure that the color is distributed evenly.

Reviews

What Katie says: "This shampoo is infused with citric acid, which cleanses the hair really gently. Bleaching hair damages the strand, but this formula seals the cuticle to prevent further everyday damage. Hair is left looking and feeling softer and more manageable." What is purple shampoo? Rebekkah O’Neil, a Master Stylish, says. “Blue shampoos are great to neutralize those unwanted brassy tones, but there are a few things you need to bear in mind when using them. Never use blue shampoos every single time you wash your hair. You will create a build-up on your hair which will make it harder to lift when it comes to your color appointment. Use a blue shampoo every 3rd wash or so.” After you've finished this at-home toning process, be sure to apply a leave-in conditioner and a heat protectant if you plan to use hot tools to keep that freshly toned hair brass-free for as long as possible.