Hair toning is a little bit more complex and blue or purple shampoo and here's what you have to know.
When you dye your hair, bleach it or highlight it, over time, the color starts to oxidize and change. This is when your mane becomes brassy and some portions of your hair become more yellowish and brunettes usually find that bleached portions become ashy. This is when toner comes in handy.
What is hair toning?
First things first, toners do not lighten the hair. A hair toner is a semi-permanent color that he's your hair recover the desired shade. Toner deposits some pigments that cancel out tones you don't like. For example, purple shampoos are great at canceling out yellow tones. On the other hand, blue toners cancel out orange tones and are perfect for brunettes.
If you overcompensate with toners, you might be eliminating all warm tones and your hair ends up looking too ashy – make sure you don't use purple shampoo more than once a week. On the other hand, not toning enough can lead to discolored or mismatched hair. There are different formulas, but they are usually shampoos or conditioners that come in blue or purple, to avoid making a mistake it is important to consult your colorist before getting a toner about which one to choose and how often you should apply it.