How Long Is Hair Dye Good For After Mixed? [3 Reasons to Avoid Expiry Hair Dye + Home Solutions]

It’s become a trending fashion to make your hair dye in different colors. Many of us like to go to the saloon and get it done by a professional. But it must be expensive.

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If you do it at home yourself, it’s not an easy task. What happens if you make the mixture of hair dye and leave it to do other work?

Definitely, you don’t get the desired result.

You must know how long hair dye is good after mixing?

Generally, a hair dye lasts within one hour after you mixed it with a developer. However, it’s difficult to explain the exact expiration date of every dye product as they don’t show any expiration date.  After mixing for 1 hour, it will react badly to your hair. It will not show any result instead of making your hair discolored.

So, you have to be careful while making a hair dye mixture. Always try to make the mixture according to your hair length.

So, if you are going to dye your hair at home yourself, this post is only for you. Before start, the process, prepare yourself to avoid any unpleasant situation.

Let’s dive into this post to enhance your knowledge!

How Long Does Hair Dye Last After Mixing

You often make the mistake of making the mixture of hair dye too early before using it. Don’t know what to do in such conditions.

If you are a hair dye lover and like to change the color of your hair from time to time, you have to know the solution.

At first, read the instructions mentioned on the product. It will guide you in a better way. It’s essential to keep in mind that each product has a different life span.

Normally, a hair dye can last only half an hour after you mix it. You have to apply the mixture in this time period otherwise it will expire.

So, to avoid wastage, try to make the mixture according to your hair length. If you have short hair, make a little mixture that will cover your hair properly. For long hair, you need some extra quantity.

This is the average time for expiration. Some good-quality products may last for 24 hours after you mix them.

How Do You Know The Hair Dye Is Expired

Now, another important point is to check the expiry date. It is written at the box of the product and sometimes on the product itself.

So, you have to check the box before using it as it is opened or not. Once you open the container, it may be affected by any bacteria or fungus. In this case, it will create a bad smell. Don’t use such products because they will damage your skin and hands as well.

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There are some common signs that will help you to guess the product expiration.

The common signs are listed below:

  • It has strange color.
  • The bottle is leaked.
  • The packaging is in bad condition.
  • You feel an unusual smell that is different from other hair dye smells.
  • The bottle cap is old.

If you open a box but don’t mix it with other ingredients, it will rust soon no matter you have stored it properly. That’s why it’s recommended to use an open product as early as possible.

Is It Dangerous To Use Expired Hair Dye(3 Reasons Not To Use)

Why you can’t use an expired hair dye? It is the most asking question. Sometimes you don’t get any damage or visible effect by using an expired hair dye.

Instead of making your hair fall down or create breakages, it doesn’t work properly to dye your hair.

There are three main reasons to stop you from using any expired hair dye.


There is a myth about old hair dye that is very common. It is said that after using an expired hair dye, your hair turns into greenish color. But there is no solid evidence to prove it.

The fact is that old hair dye can make your hair discolored. Your hair color may be fainted or become dull instead of getting a shiny and bright look.

If you have a white, gray, or light brown color, it may change into a green shade after applying expired hair dye.

Skin Burns Or Sensitivity

Many hair dye products contain a high level of chemicals so that they can show an instant result. If you use such hair colors after keeping them for a long time, it will bring skin burns and rashes.

If you have a hair dye with chemicals like ammonia, hydrogen peroxide, or resorcinol, don’t keep it long. Use it as early as possible.

Signs Of Allergy

Another side effect of applying an old hair dye is allergy. But the question is that how do you know, your skin is getting allergies by using hair dye?

You can see the results after 72 hours of using hair dye. If it is expired, it will display the following symptoms:

  • Swelling
  • Soreness
  • Itchiness
  • Reddish skin
  • Trouble in breathing
  • Burning
  • Spots/Pimples

If you have sensitive skin, avoid using products that are made of chemicals.

Easy Home Solutions To Dye Hair

To prevent chemicals, we have an easy solution for those who love to dye hair. You can use some home remedies that work like hair dye and are easy to apply.

So, you don’t have to spend much money to buy expensive hair dye. Here is the list of home solutions that you can use as hair dye:

1.  Carrot Juice

If you want to get a reddish-orange shade for your hair, use carrot juice. Let’s read the process!


  • Carrot Juice
  • Coconut or Olive Oil
  • Plastic Hair Cap
  • Apple Cider Vinegar
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How To Apply:

Mix carrot juice in coconut or olive oil and make a mixture. Apply the mixture to your hair in a way that it may cover all the area. Now cover your hair with a plastic cap and leave it for an hour. Remove the mixture by using apple cider vinegar. Lemon Juice

To get permanent results, lemon juice is best. Read the instructions carefully and follow them.


  • Lemon Juice
  • Spray Bottle
  • Comb

Method To Apply:

Take a spray bottle and fill it with lemon juice. Spray the liquid on your hair. Spread the use to all of your hair by using a comb. Take sunrays for the best results. Wash your head after one hour.

2.  Henna

To dye your hair naturally in red color, you can use henna(a natural plant/herb). Its color can last at least 4-6 weeks.


  • Henna Powder
  • Bowl
  • Plastic Wrap
  • Coconut Oil
  • Hand Gloves

How To Apply:

Take some water and add ½ cup of henna powder. Mix it well and leave it for 12 hours by wrapping the bowl with plastic. Use a headband to cover your hair and apply coconut oil to your washed hair before henna.

Now apply the mixture by making sections of your hair. Put on the hair cap and wash your head after 2 hours. Don’t forget to wear hand gloves as it will save your hands from getting henna color.

3.  Beet Juice

For the darker or deeper red color, use beet juice.


  • Beet Juice
  • Olive Oil
  • Hair Wrap/cap

How To Apply:

Mix beet juice and olive oil well. Apply it to your hair carefully and wrap your head with a plastic cap. Wash the juice after an hour.


Can leftover hair dye be kept?

Yes, it can be kept unused hair dye if you are applying permanent hair color. But can be workable only if you don’t mix it with the developer. Seal the color and developer tightly and keep it in a cool dark palace.

How long can hair dye sit after being mixed?

Definitely, hair dye can’t sit around for a long time. Don’t leave the mixed hair dye for more than 24 hours as an expired mixture may bring damages and make your hair brittle.

Can you put leftover hair dye in your conditioner?

If you do that, you have a big chance to lose your hair color whenever you apply conditioner. You can add hair dye to the conditioner only if your hair color is solid and strong.

Bottom Lines

Here we sum up our informative post about the expiration of a hair dye. Hopefully, after reading this post, you will be able to handle the problems created by applying an old hair dye.

Interestingly, if you have sensitive skin, we provide some easy home remedies to dye your hair. In this way, you can get the hair color you want without any fear of chemical reactions.

Share it with your near ones who are worried about hair dye and its side effects. If you know something else about hair dye, share your experience VIA comment section.

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