This is meant for people with platinum, silver, ash-blonde, or heavily highlighted hair who want ongoing brass control built into a daily conditioner rather than a separate purple mask they have to remember to use once a week. It suits anyone already following a toning routine (purple shampoo, gloss, or salon toner) who wants a compatible everyday conditioner, more than someone looking for a single strong corrective treatment on badly brassy hair, since a rinse-out conditioner deposits color more gradually than a dedicated mask.

The case for a toning conditioner over a separate purple mask is frequency: because it replaces the everyday conditioner rather than adding an extra step, the violet pigment gets reapplied every time the hair is washed, which suits platinum and silver shades that tend to pick up brass quickly. It's a lower-intensity approach than a weekly mask, trading one strong dose of pigment for a smaller amount delivered consistently.

After shampooing, massage a generous amount through damp hair, concentrating on mid-lengths and ends where lightened hair tends to be driest and most porous. Leave it on for one to two minutes to let the conditioning agents and violet pigment take effect, then rinse thoroughly. On very light or porous hair, keep an eye on processing time, since leaving heavily-toning conditioners on longer than directed can deposit more pigment than intended.

Pros:

• Builds brass control into a daily conditioner instead of requiring a separate weekly purple mask
• Keravis protein complex and botanical extracts address dryness and brittleness that often come with heavy lightening
• Sulfate-free formula won't strip toner or gloss between salon visits

Cons:

• Gradual pigment deposit means it won't correct heavily brassy hair as quickly as a dedicated toning mask
• Contains isopropyl alcohol and fragrance, both potential sensitivities for reactive scalps
• Violet-tinted conditioners can, with overuse or overly long contact time on very light hair, leave a faint gray or lavender cast