Yes, you can tone hair twice, but it should be done with caution. Double toning can be a good idea for correcting brassiness or achieving a specific shade, but it's you should always consider your hair's health and consult with a professional for safe guidance.
If your hair is still yellow after toning, then you likely didn't formulate dark enough for the toner to cover. You'll need to reformulate, dropping the toner another level or two to ensure it covers the yellow properly.
You can typically tone your hair again as soon as you feel it's necessary, but it's advisable to wait at least 2 to 4 weeks between toning sessions. This waiting period allows your hair to recover from any potential damage and helps maintain its health.
If your lousy bleach job has come out more yellow, you'll need a purple toner. Purple shampoo can help neutralize the yellow. If your hair is orange, you'll need a blue toner. Try a blue shampoo to tone the brassiness and get rid of the orange.
Toning your hair twice in one day is generally not recommended, as it can lead to damage or dryness. Hair toners often contain chemicals that can be harsh, especially when applied multiple times in a short period.
There's two reasons why your hair is still brassy after toning or colouring. Either the undertone of the toner/colour is wrong, or the product is too light for you.
If you have any orange left in your hair, T14 is probably the best for your hair over T18. T18 is only effective if your hair is a level 10 or higher (purely yellow). Putting the wrong toner in your hair won't necessarily harm it, but it likely won't affect the color at all.
Blonde blends better with grey
Grey hair in blonde hair or grey roots in blonde hair blends better than with darker hair. So blonde is a good choice if you want to make your grey hair or grey roots less noticeable.
You can use regular permanent toners for repeat toning operations. Allow 4-6 weeks between 2 toning operations with regular permanent toners. By the time 4-6 weeks have come around, you will have a regrowth. So it's a good time to refresh the color of the hair in any case.
You want the hair cuticle to be open for toning. Towel-dry hair to about 65 - 75% dry then start toning. Usually color & bleach is on dry hair, even toners and colors that do not require developer; however toner that uses developer is recommended on towel dried hair.
"Experts advise waiting at least 2 weeks (technically 15 days) before dyeing it again. However, this is the minimum amount of time and, in some cases, you may need to extend that period to 4 weeks.
And secondly, as a blonde, your previously bleached lengths (even those close to your roots) are likely quite porous. This means they will soak the toner up quicker. Your roots, on the other hand, will be much less porous and therefore will not soak up as much of the toner.
20 Vol Developer will lighten your hair slightly and will give permanent results. Use this with Wella Colour Charm Permanent Toners, along with Shimmer Lights Toners and Lightener. Keep in mind, as 20 Vol Developer lightens your hair slightly, it can cause brassiness at your roots (if they're darker than your lengths).
Any time you go lighter than your natural color, you will bring up your natural underlying pigments.” Brown and black hair have darker orange and red underlying pigments than naturally blonde hair, which is why these hair colors tend to turn more brassy once lightened.
The main difference between toner and hair color is that the former simply deposits pigments on the surface of the hair, while the latter—at least in the case of permanent hair color—introduces color deep into the hair cuticle. And because they only act on the surface, toners won't damage your hair.
The Colour Wheel Shows You Which Hues Tone Orange Hair
It tells you which hues 'cancel' each other out for a balancing effect. In the case of orange hair, a touch of blue pigment will cool and calm too-warm locks, while a hint of violet is also helpful for yellow/orange strands on a level 7.
Wella Colour Charm Toner T14 Pale Ash Blonde
This toner can also be mixed with the Wella 050 Cooling Violet Toner on more orange hair. Adding in the Wella 050 Toner will give you a boost of really strong Ash tones so the combination of both should help to turn that orange brassiness into an ashy tone.
For creating the most ashy blonde.
Wella T14 has a blue-violet base, which means it will counteract (or reduce) gold / yellow orange tones. This is a super cool toned toner that works best on pale yellow hair.
You should wait at least two weeks after your last dye session to re-dye your hair, regardless of the reason. If you're maintaining your color, stylists recommend returning to the salon every four to six weeks for a touch-up.
“Toning your hair twice in one day can be rough on your locks. If the toner is not used with a low volume developer, it might leave your hair feeling dry and unhealthy. If you're not getting the color you want, it might be a sign of an underlying issue in your color process.”
Make sure you get washed immediately after you notice you have over-toned those locks! Most toners are not permanent, therefore eventually, after several washes, the 'cool' tones will fade. If you want that toner gone quicker, 2-3 washes with a clarifying shampoo will start to remove the blue, grey or purple stains.