Our Take
K18's answer to brassiness in lightened or colour-treated hair. TripleBright uses a three-phase approach: ionic detox to remove brass-causing metals and minerals (including up to three months' worth of hard water copper in one wash), precision violet technology to neutralise existing warm tones without overtoning, and a biopolymer shield to help prevent metals and minerals from reattaching in future washes. A foam format rather than a traditional shampoo consistency. Launched in 2025. Designed for use one to two times per week, alternated with the DAMAGE SHIELD or PEPTIDE PREP shampoo. Surfactant profile places it in cgm_modified territory. Most relevant for bleached or highlighted curlies dealing with brassiness alongside structural damage.
Who is this for?
Our assessment — not the brand's claim
Curl Pattern
Porosity
Free From
Ingredients at a Glance
Water
Universal solvent and primary base of most hair products.
Cocamidopropyl Hydroxysultaine
Mild amphoteric surfactant that boosts foam. CGM-friendly.
Sodium Methyl Cocoyl Taurate
Gentle amino acid-based surfactant. CGM-friendly.
Propanediol
Plant-derived solvent and humectant that helps other ingredients penetrate.
Aspartic Acid
An amino acid involved in protein synthesis. Contributes to the natural moisturising facto…
Free From
Want to know more about an ingredient? Browse the ingredient glossary →
How to Use
Apply 2–3 pumps to wet hair in place of your regular shampoo. Work through lengths and leave on for 1–3 minutes. Rinse thoroughly. Use once or twice a week — more frequent use can dry the hair. For best results, follow immediately with the K18 molecular repair mask.
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Where to Buy
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K18 Hair UK
Details
- Price tier
- premium
- Routine step
- Cleanse
Reviews
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