I Forgot to Wet My Hair Before Dyeing it, Is that a problem?

scared woman with hair wrapped in towel

  • No, you don’t have to worry if you forgot to wet your hair before dyeing it, because it’s not a big deal. In fact, the opposite is true!
  • Because in reality, you should always apply dye to dry hair.
  • If you had wet your hair before dyeing it, the color would have turned out dull and faded. And most likely, you would have had to dye your hair again. And that would be a mistake. I’ll tell you why later.


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 Did you forget to wet your hair before dyeing it?  Perfect. No, I’m not crazy. I have only words of praise for you.

Because you should apply dye to dry hair.  So you didn’t make a mistake, and it’s not a problem that you didn’t wet your hair before dyeing it. 


So if you forgot to wet your hair before dyeing it, don’t worry.

And this is exactly what I just repeated for about the tenth time to a client who called me and sounded as if the world was ending.


I’ll tell you the situation.

Nine o’clock at night. Alejandra, that’s me, who at that moment is a simple housewife preparing dinner for her children, is interrupted by the incessant ringing of her phone.

You know that moment when you’re just about to turn a potato pancake to give it that final golden brown touch?


If you don’t know, I’ll tell you. You can’t concentrate on anything else.

But there was my cell phone. It kept ringing insistently, as if someone wanted to tell me that we were in the middle of an alien invasion.

What was the result?


I left the potato pancakes and answered the call. I heard the tearful voice of my client Aldana, who kept repeating she had forgotten to wet her hair before dyeing it.

Excuse me, what’s the problem? What’s the mistake? What are you talking about?

After ten minutes of assuring her that nothing would happen to her hair because she hadn’t wet it before dyeing it, I was finally able to end the call.


Needless to say, my kids didn’t eat potato pancakes that night – thank goodness for home delivery these days!

So, please. Don’t get anxious. Because there is only one reality.


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You shouldn’t wet your hair before you dye it… and if you forget, all the better!

 Because you should always apply dye to dry hair . And this has a scientific explanation.

Everything around us is made up of molecules. When you wash your hair, water molecules penetrate through your hair cuticles to the inside of your hair, where they lodge to hydrate it.


Moisturizing gives your hair shine, softness, flexibility, and elasticity. And those are the characteristics of strong, healthy hair.

While your hair is wet or damp, it absorbs moisture. And that’s fine, as long as you don’t plan to color your hair.

 Because if you wet your hair before you apply hair dye, the color will turn out faded and dull. 


Just imagine this situation.

You wet your hair, you apply a red dye that’s vibrant and eye-catching, and after the exposure time, you rinse it out.

What’s the first thing you do after rinsing out the dye and once your hair is dry?


You look in the mirror!

But when you look in the mirror, that vibrant, brilliant red dye is gone, it’s just not there. Because your hair, instead of being red, it’s… well… Even I can’t picture it.

But not to be dramatic, your hair will be… deep pink? I don’t know. The important thing I want to make clear to you is that if you wet your hair before you dye it, the color will be totally washed out.


Because if you apply dye on wet hair, the color molecules will mix with the water molecules that are already in the hair fiber, and the dye pigments will lose their intensity. The water molecules water down the color molecules.

  •  If you wet your hair and apply dye to cover gray hairs , your gray hair will still be there, annoying and noticeable as ever.
  •  If you wet your hair and apply dye to renew the color , your hair will still stay as faded and dull as before.
  •  If you wet your hair and apply a dye to change the color of your hair , bad news. You won’t see much change in your hair. Because there will be no new color.

Have you realized it yet? You were starting off with the wrong idea.



Because you always apply hair dye to dry hair

dye application on dry hair

 If you apply the dye on dry hair, the pigments will be able to penetrate the outer layer of the hair and be deposited on the inside, to modify the color of your hair. 


The pigments will not compete with the water molecules for space, as they would if you had wet your hair before coloring.

Also, if you wet your hair before coloring, as the color will turn out faded or uneven, you’ll face yet another problem.


 You will have to re-color your hair.  And if you can’t wait at least fifteen days to do it, you will expose your hair to two strong chemical processes within a few days.


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Because in case you didn’t know, when you apply a dye, the developer and ammonia generate a chemical reaction that changes the color of your hair. Therefore, after applying two dyes in within a short time, your hair will lose a lot of moisture and nutrients and become weak and brittle.



So, take it easy. You’ve done very well not to wet your hair before dyeing it.

Because you should always apply hair dye to dry hair. Many women complain that their dye lasts only a short time. And it usually lasts so little time because they’ve applied it to wet hair.

So this time you’re… saved by the bell!

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