How To Make Curly Hair Permanently Straight?

Curly Hair Permanently Straight
Curly Hair Permanently Straight

Do you want your hair to be smooth and straight throughout the day? It’s possible to use the permanent process of hair straightening. Making curly hair straight permanently is a chemical procedure that removes all traces of curls and waves.

You might be shocked that straightening hair dates to Ancient Egyptian times, though it gained popularity in the 1980s.

Continue reading this article to learn how to do curly hair straight and all you must know about permanently straightening your hair.

Types of Permanent Hair Straightening

Hair that is naturally curly, textured, or frizzy can undergo chemical treatments to straighten hair permanently. Some people may choose this route to have a more relaxed everyday hair regimen due to the style or societal pressures and expectations for beauty.

There are a variety of methods that can provide long-term benefits for curly hair straight. However, each method has its pros and cons.

  • Japanese Straightening (Thermal Reconditioning)

Using heat and chemicals, Japanese straightening is a conditioning and smoothing treatment that permanently alters hair structure. When you undergo the Japanese straightening treatment, the protein bonds in the hair are broken and transformed into hair cells. This procedure requires several steps ranging from 6 to 8 hours. 

After a couple of days, you’ll need to return to the spa for approximately an hour for the final stage. 

However, this procedure lasts for 6 to 7 months. While it’s as amazing and durable as this treatment may sound, it could damage hair over the long term, particularly when your hair is colored or has received various chemical treatments.

When you’ve had your perfect curly hair straight, remember to take care of the post-treatment hair treatment.

To ensure it is set, it is recommended that you avoid shampooing your hair and pulling it up into a ponytail for at most three days after treatment. In the future, it’s crucial to apply hair masks that nourish your hair frequently, stay clear of alcohol-containing products, and select shampoos without sulfate.


  • It also adds shine.
  • Creates pin-straight hair.
  • Reduces frizz on hair.
  • It utilizes a cystine-based solution and doesn’t carry the risk of exposure to formaldehyde.


  • It can’t be reversed if you aren’t satisfied with the outcome.
  • It needs to be touched up approximately every eight to ten months.
  • Avoid water and ponytails for the initial three days after treatment.
  • This can greatly increase the harm done to colored or chemicals-treated hair.
  • It is not suitable for everyone, but it depends on the hair type.
  • Highest cost.
  • Although less than other methods, it does carry the risk of contact with carcinogenic chemicals.
  • Keratin Treatment (Brazilian Straightening)

Keratin treatments have become more popular in recent years, and for good reason. They’re among the safest methods of hair straightening available. 

Keratin is a naturally occurring protein found in our hair. However, as the protein material decreases due to age and poor diet, so do keratin levels. Keratin treatments add the keratin layer onto the hair shaft to provide nutrients that make hair smooth, silky, and straight.

After an experienced salon applies keratin solution to hair, a 450-degree flat iron will be utilized to bond the formula to the hair strands (protect the ears against scorching heat, ladies!) to create a moisture barrier that minimizes frizz and provide hair with an attractive, shiny look.

The desirable benefit of Keratin treatments is that hair restructures back to its original form slowly and can be repeated without worrying about causing hair damage. Keratin treatments can bring a better payoff when used repeatedly. 

Although it’s not the most cost-effective treatment, it will surely last about 6 months, particularly if you adhere to it using Keratin-infused shampoos and conditioners.


  • It works well with all hair types.
  • Reduces frizz in hair.
  • Reduces the likelihood of split ends.
  • It enhances the shine.
  • It seals in color and prolongs its life.


  • The color fades over time.
  • Do not wear ponytails for the initial three days after treatment.
  • It is not recommended for people with damaged or extremely fine hair because of the extra dangers of heat damage. It is best recommended for straightening curly hair without heat.
  • It is excellent for smoothing hair rather than to make curly hair straight.
  • There are potential exposure risks from formaldehyde, even if products are labeled as formaldehyde-free.
  • After it has been washed out, it may not be able to return to its original form.
  • Risks inhalation exposure to carcinogenic gasses.
  • Hair Rebonding

Some believe rebonding your hair compromises Keratin Treatment and traditional Japanese thermal straightening. 

Similar to both treatments, it may benefit by boosting the shine and creating less maintenance-intensive hairstyles with smooth and polished edges. The primary difference is that the hair-rebonding chemicals do not contain formaldehyde.

A well-qualified stylist uses an ingredient in a cream that permanently alters the hair’s structure. 

It breaks the disulfide bonds connecting amino acids and then rebuilds the hair with a new, straighter, permanent structure.

Depending on the length and type of hair, the whole hair rebonding process could take between three and eight hours.

The payoff of the treatment for hair rebonding generally lasts six to seven months.


  • Reduces frizz in hair.
  • It also adds shine.
  • Gives a silky smooth look to your hair.


  • It fades out with time.
  • Risks of exposure to chemicals and fumes.
  • Hair is likely to stay in its original form.
  • One of the more expensive and time-consuming options.
  • Most often, the procedure is done together with formaldehyde and aldehyde-containing chemicals, thereby increasing the risk of exposure, which includes the possibility of uterine cancer.
  • Chemical Straightening

Traditional chemical treatments to make curly hair straight are often known as hair relaxers. Their roots within the U.S. can be traced back to the beginning of the 1900s.

Hair relaxers play a crucial part within the Black community because of the societal prejudices against natural hair, both in work and social environments. 

A study in 2021 revealed that two of three Black girls aged between five and 18 who attend schools predominantly white have been subjected to discrimination based on hair.

A stylist uses a chemical relaxer. The principal ingredient is sodium hydroxide. It aids in breaking bonds within the shaft of hair. After breaking the hair’s curls, straighten them out to achieve the appearance of sleekness.

The procedure could take two to three hours, according to your hair’s length and type.

The payoff of chemical straightening is permanent. However, new hair growth requires regular touch-ups every six or 12 weeks.


  • It will be washed out later.
  • It works well with coily or curly hair. 
  • It’s the cheapest choice.


  • It can significantly boost the damage to colored hair that was chemically processed previously.
  • Cutting off your hair when you no longer want straight hair is necessary.
  • Increases the risk of inhalation exposure to carcinogenic chemicals compared to other techniques.

Non-Chemical Way of Straightening Your Hair

  • Flat Iron is a device that uses heat to straighten your hair. This is the most efficient and least time-consuming method to complete straight hair. 

However, because the flat irons can expose hair to high temperatures, they can cause hair breakage and dry scalp. It’s important to use good protection against heat when styling your hair.

  • Blow-drying: Blow-drying your hair can leave it soft, smooth, and arranged according to your preference. However, staying away from high temperatures and applying a heat shield is essential because excessive use can result in burning scalps and dry hair.
  • Straightening Brushes: You must brush the hair, and then the tool will straighten and untangle your locks simultaneously. 

While straightening brushes are useful and require less direct energy than flat irons or blow dryers, there are complaints that they can cause split ends.

Alternative Salon Treatments

  • Amino-acid Treatments: These treatments to make curly hair straight use organic compounds to smooth your hair. 

The treatments last between 6 and 8 days and benefit hair growth overall. This is a healthier treatment choice that doesn’t harm, unlike other methods.

  • Deep Conditioning Treatments provide your hair with moisture to keep it free from frizz, dryness, and damage. 

Though deep conditioning may be an excellent method of maintaining hair health, it could result in limp and oily hair when applied too frequently. Use various natural methods for straightening curly hair without heat. 

How Long Does Permanent Straightening Last?

Depending on your growth pattern, the permanent straightening of your hair will last up to 4 to 6 months. At this time, your hair’s curly roots will increase, and you should apply touch-ups to remove frizzy hair.

Pros And Cons Of Straightening Your Hair Permanently


  • If you do it at home, permanently straightening your hair is economical.
  • It’s easy to do at home, and the hair is easier to manage.
  • Relaxers sold at stores are generally less concentrated than those used in salons. They could deliver similar outcomes but without putting your hair at risk.
  • It can last for a long period (4-6 months).


  • This method can cause split ends, hair loss, and breakage if executed incorrectly.
  • You should avoid coloring your hair to keep it straight.
  • Based on the method you select, your hair will not pin-straight.

Straightening Curly Hair At Home Methods

Below, we will discuss methods for straightening curly hair at home.

  • Coconut Milk and Lemon Mask

Lemon juice and coconut milk can help promote straight, shiny hair. 

Mix 1/2 cup (120 milliliters) coconut milk and 2 tablespoons (30 milliliters) fresh lemon juice into the jar and cover it with a tight seal. Place the jar in the fridge and let it cool throughout the night.

  1. Apply the white liquid to your hair. Finally, put on the transparent liquid that comes from the bottom.
  2. Wrap your hair in a silk wrap or towel for one hour before washing it with shampoo and conditioner. Repeat the treatment every week.
  3. Hair can absorb vitamin C from lemon juice and coconut milk fats, which makes curls appear longer and less weighed down.
  • Aloe Vera Mask

Aloe vera is a natural remedy for restoring elasticity and softening, straightening, and smoothing hair. Cut off three Aloe leaflets and scrape the pulp. 

Apply it directly to the ends and middle of your hair. Allow it to sit for 10 – 15 minutes.

  1. If your hair grows very thick, make a pulp by mixing it with two tablespoons (30 milliliters) of liquid.
  2. Rinse the aloe vera using conditioner and shampoo. Apply the mask 2 – three times per week.
  3. Fresh aloe leaves are the best. However, you can also use gel that you can buy instead.
  4. For a scent boost, add some drops of rosewater.

Related: 7 DIY Homemade Hair Mask for Curly Hair

  • Mask Of Olive Oil And Eggs

Like egg yolks, they can fill the hair with protein benefits. Imitating the actions of the keratin treatment (hair smoothing), eggs mixed with olive oil benefit you by providing you with smooth and well-maintained hair. 

The antioxidants in eggs repair damage to hair, and the fat acids focus on nourishing hair follicles.

Pro Tip:

Mixing the ingredients thoroughly is the most important thing to remember when making this mask. Because they’re both incredibly harmful and negatively impact your hair, you’ll need whisks to create an even consistency. 

This helps in applying the. Apply it evenly over your hair, and leave it on for a minimum of 30 minutes. Rinse your hair with a cleansing gel shampoo until you have removed all the odor from your hair.

  • Mask Of Papaya And Bananas

Rich in potassium and natural oils as well as vitamins and carbohydrates, fruit and bananas smooth your hair and improve the natural elasticity of hair. 

Together with the Vitamin A-rich papaya mask, this hair treatment assists in raising the strength of tensile hair and gives it a straight appearance.

Pro Tip:

Mix equal amounts of papaya and bananas and then mash them. Be sure to get all the lumps, then mix them to create a smooth paste. Make use of your hands to apply the mixture to your hair. Leave it for 45 minutes or until it’s dry. Rinse your hair using cold water and mild shampoo.

  • Rice Water Rinse

A common beauty practice popular among Chinese females, rice water rinses are the main reason for their sleek, long, shiny locks. 

Rice water nourishes hair with vitamins A, C, and E, flavonoids, and phenolic compounds. It improves hair texture and appearance.

Pro Tip:

It is crucial to rinse and clean the rice to eliminate impurities or dirt before preparing it. Rinse and strain the rice until the water does not appear to have any trace of dirt. Following washing, combine fresh rice in a bowl and add purified water. 

Stir it until the water begins to cloud. Then, strain it out of the rice. The rice water can be stored in glass containers covered with a lid. 

Allow it to sit at room temperature for between 12 and 24 hours.

The process of fermentation releases all the minerals and vitamins that provide nourishment to your hair. 

The accurate way to use your rice water is to apply the water from your rice right away for the best outcome.  If you want to keep it in storage in the future, you can put it in a shampoo or spray bottle and store it in the fridge for up to one week. 

It can be used to rinse your hair after shampooing, or as a spray anytime it is dry or squishy.

Tips For Permanently Straightening Your Hair

  • Consult A Professional

Because powerful chemical hair straighteners are used, straightening your hair for a long time could cause hair loss and fallout, particularly in fragile hair. 

Therefore, it is recommended that you seek advice from a competent person who can suggest a method for your hair type.

  • Do Not Use Shampoo

The scalp is irritable after washing your hair and needs rest to restore strength. 

If not given a sufficient period for resting, the scalp could negatively react to the chemical hair straighteners and trigger a burning sensation. 

So, you should wait at least one week after straightening to wash and condition your hair.

Read Related : How To Wash Curly Hair

Quick Tip

Use a sulfate- and paraben-free shampoo for smooth and clean hair for a week following your straightening treatment. 

However, shampoo at least once every three days to prevent drying out your hair.

  • Detangle Your Tresses

If the curls of your hair are incredibly frizzy or knotted, it may be challenging to cover it with a straightening product. Therefore, you should detangle your hair before straightening it.

Related: How To Detangle Hair: Simple Tips For Different Hair Types

  • Opt For A Neutralizing Shampoo

Even after being washed away, the relaxer could cause hair damage and burns to the scalp. A neutralizing shampoo can combat this and help prevent overprocessing.

  • Condition Your Straightened Hair

Permanent hair straightening treatments can dry out hair. 

To replenish the moisture in your hair, you should apply conditioning every time you wash it. Apply a deep-conditioning treatment at least once a week.

More Curly Hair Straight Tips

  • Wait to put your hair in a ponytail right after straightening. 

Do not risk making the hair in an elegant kink hairstyle! Hair that’s just been straightened is more prone to bends and kinks in elastics for hair than hair that has been in the same condition for two or three days. 

  • Smoothing oil can quickly reduce frizz and nourish dry hair. 

Dry oil can rejuvenate straight hair and make it appear as smooth and shiny as it did the day before. A cream for hair straightening could also be beneficial.

  • Regularly trim your hair. Too much straightening and exposure can cause split ends and frizzy hair strands. Cut curly hair frequently to clean dry ends and ensure your hair stays healthy.
  • You can sleep on silk. One of the most serious hair damage is caused by sleeping.

    If you want to know more about sleep with curly hair read our detailed guide on : How to Sleep with Curly Hair

A rough pillowcase can cause friction that causes frizz, which can cause you to awake with a wild head. Change your pillowcase’s cotton for silk to reduce friction and eliminate frizz.

Key Takeaway

Women who regularly use chemical products to make curly hair straight have twice the risk of getting cancer of the uterine before the age of 70.

Hair straightening chemicals come with the possibility of exposure to cancer-causing gasses. 

It happens when you inhale chemical vapors.

Black women are disproportionately affected by the health risks associated with chemical hair straightening products because they utilize the products more frequently than other segments of the U.S. population.


How Often Can I Straighten My Naturally Curly Hair?

The degree to which hair can endure the heat without suffering damage depends on various aspects, such as hair type, condition, and method. Limiting your hair’s straightening to 2 or three times a week is generally recommended. 

Can Curly Hair Become Straight Over Time?

The short answer is yes. Your body’s natural hormone secretions impact the curly nature of your hair. Curls can loosen and alter shape or pattern due to hormonal issues that change over time.

Can You Permanently Straighten Curly Hair?

Permanent hair straightening procedures are an example of chemical processing you can apply to your hair. Based on the treatment method, you select hair that’s naturally curly or has a texture that could be made flat and shed its curl.

Is There A Way To Permanently Change Your Hair From Curly To Straight?

Keratin treatment is considered the safest way to permanently straighten hair because it does not rely on harsh chemicals as relaxers and permanent waves do. A stylist applies a keratin-based product containing the formaldehyde derivative to the hair.


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