How long to leave Wella T18 toner on? What happens if you leave it for more or less time?

  • Wella T18 toner should be left on the hair for a maximum of 20 minutes.
  • If you leave it less, it won’t neutralize the orange tones you want to remove.
  • Alternatively, if you leave it any longer, you’ll only dry out your hair. The toner will lose its neutralizing effect, but the peroxide will dehydrate your hair.


from orange to blonde

Toner is used when unwanted tones appear after bleaching or hair dye application. Why?

Because it’s the only effective weapon against orange or yellow tones to get an even color in the hair.


 But, if you don’t use toner correctly, things can go wrong. 


And one of the biggest mistakes people make is not being strict with timings.

This is a common mistake when using Wella’s T18 toner.

Let me tell you a story from the usual ones at the salon every other day.


A few days ago, Isabel came into my salon and couldn’t hide her anger.

She looked like one of those souls that come out of hell to scare mortals!

And the reason for her anger was understandable.


In another salon, a colleague had made a real mess of her hair.

Isabel had been promised to make her dream come true: to take her hair to a light ash blonde 8.1 in one day.


Of course, they never told her that she had to go four shades lighter with bleach because her natural color was brown 4.

Then, the worst happened: her hair turned carrot orange.

What had happened?


According to the information Isabel gave me, after bleaching her hair, they used Wella’s T18 toner to neutralize the orange tones. However, they only left it on for five minutes.

Of course, Isabel doesn’t know about toners. After all, she’s a customer and not a colorist.

Therefore, when the T18 toner was rinsed off after five minutes, she didn’t even flinch.


However, when she got home, she couldn’t believe her eyes. Then, as the days went by, the situation didn’t improve because her hair looked more orange.

Of course, toner fades with washes.

Do you understand?


 The time you leave Wella T18 in your hair is critical.

If you don’t leave it in for the time recommended by the manufacturer, the toner won’t neutralize the orange.

Luckily for Isabel, her hair had a solution. I’ll tell you about it next.

Tabla de Contenidos


Why you should leave the Wella T18 for 20 minutes maximum on your hair

Poor Isabel!

As I looked at her hair and put myself in her shoes, I could really understand her anger and disappointment with the other stylist.


In a way, I could also understand the fear she felt about putting her hair in the hands of another professional.

Therefore, I had to gain her trust. The best way to do it was to explain to her how I was planning to solve her problem before touching a single hair.


I began to explain to her the mistake the hairdresser had made on her hair. It had to do with the exposure times of the T18 on the hair.

Perhaps, the colorist lacked experience or was simply an unresponsible professional. We’ll never know.


 Using a toner takes practice because it starts working immediately. So, you have to monitor it and leave it on for 20 minutes at most. 

Toner neutralizes unwanted colors. It’s frequently used in beauty salons.

However, it must be used in a certain way and for a certain time.


  • THE WELLA T18 TONER SHOULD BE ON THE HAIR FOR 20 MINUTES. If you leave it for less time, you’ll not be able to neutralize the color, and the result will be disastrous.
  • The toner is applied with a 20-volume developer. If you use a higher developer, you risk lightening the hair and getting uneven tones.
  • You must apply the correct toner based on the neutralization chart.


When I explained all this to Isabel, I think she could see the light at the end of the tunnel. At the very least, I felt she was trusting me.

So, I used Wella’s T18 and didn’t move from her side while the toner worked.


After 20 minutes, I rinsed her hair and dried it. When she saw the mirror, she was excited because her hair was finally the color she had always wanted: pale ash blonde.

Finally, I recommended that she maintain her color with blue toning shampoo and gave her an appointment in three weeks to touch up her toner.

Mission accomplished!


One person had regained confidence in my profession.

Now, if you want to apply Wella T18, pay attention to exposure times. Here’s how to do it.


How to apply Wella T18 correctly while respecting the exposure time

toner, developer, bowl and brush

Before you start, you have to know which toner to apply.

If you like to do everything and not waste time in the salon, pay close attention.

To choose the right toner, you must take into account the neutralization chart:

  • If you want to neutralize yellow, you should apply violet toner (Wella T10).
  • If you want to neutralize orange, you should apply blue toner (Wella T18)
  • If you want to neutralize red, you should apply green toner (Wella T14)


In this case, Wella T18 is a light pale ash blonde. It contains blue pigments. As they’re the opposite color to orange, they’ll neutralize it.


The application is actually very simple.

 Remember that you can apply Wella T18 immediately after bleaching. Alternatively, you can wait a few days. In the meantime, moisturize your hair. 


Here is the list of materials you’ll need:

  • Wella Color Charm T18
  • A 20-volume developer
  • Coloring brush
  • Gloves
  • Hair clips
  • Comb


Step by step:

after bleaching

  • You can apply the T18 on your dry or damp hair, whichever is more comfortable for you.
  • Separate your hair into four sections, 2 front and 2 back, holding each section with hair clips.
  • Prepare the Wella T18 mixture according to the manufacturer’s directions. You can do this in the bottle included or in a plastic container.
  •  Apply the T18 toner all over your hair, starting with the back sections.  You should always do it from roots to ends and leave it on for 20 minutes. Don’t leave it any longer! After 20 minutes, the toner will lose its effect, and your hair will dry out.
  • You’ll immediately notice that your hair starts to change color. So, don’t forget to check it every 5 minutes.
  • Then, rinse out the Wella T18 removing all of the product. If you want, you can use shampoo and conditioner.
  • Blow-dry your hair on medium heat. Then, apply a few drops of coconut oil or anti-frizz oil.


YOU MAY ALSO BE INTERESTED IN: Should I wash my hair after using Wella toner? What shampoo should I use?


That’s it! The orange is gone, and your color is even without bright tones.



Isabel had a bad experience at the salon because of a mistake in the exposure times of Wella T18. The toner should always be on the hair for a maximum of twenty minutes.

You have to respect the exposure times if you want to achieve the best results from Wella T18.

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