- Three Months of Brass, One Wash: K18's testing shows a single use removes up to three months of brass buildup from hard water.
- Brighter Blonde, No Overtone: The precision violet technology corrects yellow and orange tones without turning the hair purple or grey.
- Hair Stays Soft, Not Stripped: Unlike many traditional purple shampoos, the formula won't dry out the hair or leave it feeling stripped.
- Works on Every Blonde Tone: Highlighted, platinum, lifted, balayage, grey, silver, white : all benefit from the same triple-action approach.
- Salon Colour Lasts Longer: Defending against future brass between washes extends the life of your salon colour.
- Triple-Action Technology: The brand's signature framework : remove metals + minerals, neutralize existing brass, defend against future brass. Three jobs in one shampoo.
- No Purple Cast, No Staining: Precision violet technology means it won't overtone your hair purple, won't stain your hands or clothes, and rinses cleanly with water.
- Foam Format: Dispenses as a foam, not a liquid : easier to apply evenly and target specific areas like roots or highlights.
- K18 Science Credibility: From the same biotech-driven brand behind the molecular repair mask. Patented research, salon-tested results.
- Vegan, Cruelty-Free, B Corp Backed: Made by K18 Biomimetic Hairscience.
- 1. Wet Hair Thoroughly: Standard shampoo prep : fully saturate the hair before applying.
- 2. Dispense 2 to 3 Pumps of Foam: The foam format makes application precise. Two pumps is enough for most short to medium hair; three for long or dense hair.
- 3. Distribute Evenly From Roots to Ends: Lather through the hair as you would a regular shampoo. The violet colour won't transfer to your hands or skin.
- 4. Let It Sit for 1 to 3 Minutes: Shorter time (1 minute) for maintenance use, longer (up to 3 minutes) when brass is more pronounced. Don't exceed 3 minutes.
- 5. Rinse Thoroughly: The formula rinses completely with water. No residue, no staining.
- 6. Pro Tip: Use 1 to 2 times per week, not daily : the goal is brass control, not bleach. For maximum impact between salon visits, pair with K18's leave-in molecular repair hair mask once a week to maintain strength alongside colour. If your hair is severely affected by hard water (Calgary water is medium-hard), consider following with K18 Peptide Prep Detox Shampoo monthly to do a deeper mineral cleanse. Heads-up : a small number of reviewers have reported the foam being drying for already-fragile hair, so follow with a hydrating conditioner if your hair runs dry.
What is K18 TripleBright used for?
K18 TripleBright is a purple shampoo specifically designed to remove brassiness from blonde, highlighted, grey, platinum, and lifted hair. It uses K18's triple-action technology to do three things at once: remove metals and minerals from hard water (which are the underlying cause of brassiness), neutralize existing yellow and orange tones, and defend against future brass by preventing those minerals from reattaching during washing. The result is brighter, more even blonde tones that last longer between salon visits, without the dryness or purple staining you get from traditional purple shampoos. Foam format, 1-3 minute application, suitable for all hair types and textures.
Will TripleBright turn my hair purple like other purple shampoos?
No : and this is the main thing that makes TripleBright different from traditional purple shampoos. Most purple shampoos deposit violet pigment directly onto the hair, which can result in overtoning (literally purple hair) if you leave them on too long or use them too often. K18's precision violet technology works differently : it neutralizes the brassy yellow and orange tones at the molecular level rather than depositing colour onto the strand. When used as directed (1-3 minutes), it won't stain hands, won't tint towels, won't turn your hair purple, and won't leave any visible cast. Customer reviews on the K18 site consistently call this out as the standout feature : it works without the purple-haze problem.
Will K18 TripleBright work on grey, silver, or platinum hair?
Yes : grey and platinum hair benefit from TripleBright just as much as highlighted blonde hair. The yellow and brassy tones that creep into grey and silver hair come from the same sources : oxidation, hard water minerals, UV exposure, and product buildup. The triple-action technology addresses all three. Reviews from grey-haired and platinum customers consistently call out the brightening effect on their hair without overtoning the colour purple or grey. For platinum blondes, use 1-2 minutes maximum and follow with a hydrating conditioner. For natural grey hair, the brightening and de-yellowing effect is one of the most noted benefits in customer reviews.
K18 TripleBright Oxidation Defense Purple Shampoo
SKU: 990022400288
Regular price
- Unit price
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The blonde fix without the purple cast.
K18 TripleBright is the brand's first purple shampoo, and it solves the problems that make most purple shampoos frustrating. It doesn't overtone the hair purple. It doesn't dry the strands out. It doesn't stain your hands, your bath mat, or your towels. And it actually addresses why blonde hair turns brassy in the first place : not just the symptoms.
The triple-action technology does three things at once: it removes the metals and minerals that hard water deposits onto the hair (one wash clears up to three months of buildup, per K18's testing), it neutralizes existing brass with a precision violet technology that won't overtone, and it defends against future brassiness using a biopolymer that prevents reattachment of those metals on the next wash.
Foam format, 1 to 3 minute application, works on blonde, highlighted, grey, platinum, and lifted hair. 4.9 stars on K18's site. Vegan, cruelty-free.
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- Three Months of Brass, One Wash: K18's testing shows a single use removes up to three months of brass buildup from hard water.
- Brighter Blonde, No Overtone: The precision violet technology corrects yellow and orange tones without turning the hair purple or grey.
- Hair Stays Soft, Not Stripped: Unlike many traditional purple shampoos, the formula won't dry out the hair or leave it feeling stripped.
- Works on Every Blonde Tone: Highlighted, platinum, lifted, balayage, grey, silver, white : all benefit from the same triple-action approach.
- Salon Colour Lasts Longer: Defending against future brass between washes extends the life of your salon colour.
- Triple-Action Technology: The brand's signature framework : remove metals + minerals, neutralize existing brass, defend against future brass. Three jobs in one shampoo.
- No Purple Cast, No Staining: Precision violet technology means it won't overtone your hair purple, won't stain your hands or clothes, and rinses cleanly with water.
- Foam Format: Dispenses as a foam, not a liquid : easier to apply evenly and target specific areas like roots or highlights.
- K18 Science Credibility: From the same biotech-driven brand behind the molecular repair mask. Patented research, salon-tested results.
- Vegan, Cruelty-Free, B Corp Backed: Made by K18 Biomimetic Hairscience.
- 1. Wet Hair Thoroughly: Standard shampoo prep : fully saturate the hair before applying.
- 2. Dispense 2 to 3 Pumps of Foam: The foam format makes application precise. Two pumps is enough for most short to medium hair; three for long or dense hair.
- 3. Distribute Evenly From Roots to Ends: Lather through the hair as you would a regular shampoo. The violet colour won't transfer to your hands or skin.
- 4. Let It Sit for 1 to 3 Minutes: Shorter time (1 minute) for maintenance use, longer (up to 3 minutes) when brass is more pronounced. Don't exceed 3 minutes.
- 5. Rinse Thoroughly: The formula rinses completely with water. No residue, no staining.
- 6. Pro Tip: Use 1 to 2 times per week, not daily : the goal is brass control, not bleach. For maximum impact between salon visits, pair with K18's leave-in molecular repair hair mask once a week to maintain strength alongside colour. If your hair is severely affected by hard water (Calgary water is medium-hard), consider following with K18 Peptide Prep Detox Shampoo monthly to do a deeper mineral cleanse. Heads-up : a small number of reviewers have reported the foam being drying for already-fragile hair, so follow with a hydrating conditioner if your hair runs dry.
What is K18 TripleBright used for?
K18 TripleBright is a purple shampoo specifically designed to remove brassiness from blonde, highlighted, grey, platinum, and lifted hair. It uses K18's triple-action technology to do three things at once: remove metals and minerals from hard water (which are the underlying cause of brassiness), neutralize existing yellow and orange tones, and defend against future brass by preventing those minerals from reattaching during washing. The result is brighter, more even blonde tones that last longer between salon visits, without the dryness or purple staining you get from traditional purple shampoos. Foam format, 1-3 minute application, suitable for all hair types and textures.
Will TripleBright turn my hair purple like other purple shampoos?
No : and this is the main thing that makes TripleBright different from traditional purple shampoos. Most purple shampoos deposit violet pigment directly onto the hair, which can result in overtoning (literally purple hair) if you leave them on too long or use them too often. K18's precision violet technology works differently : it neutralizes the brassy yellow and orange tones at the molecular level rather than depositing colour onto the strand. When used as directed (1-3 minutes), it won't stain hands, won't tint towels, won't turn your hair purple, and won't leave any visible cast. Customer reviews on the K18 site consistently call this out as the standout feature : it works without the purple-haze problem.
Will K18 TripleBright work on grey, silver, or platinum hair?
Yes : grey and platinum hair benefit from TripleBright just as much as highlighted blonde hair. The yellow and brassy tones that creep into grey and silver hair come from the same sources : oxidation, hard water minerals, UV exposure, and product buildup. The triple-action technology addresses all three. Reviews from grey-haired and platinum customers consistently call out the brightening effect on their hair without overtoning the colour purple or grey. For platinum blondes, use 1-2 minutes maximum and follow with a hydrating conditioner. For natural grey hair, the brightening and de-yellowing effect is one of the most noted benefits in customer reviews.
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