25 Aug 2023 Category - article

Hair smoothing treatment features explained.

Hair smoothing treatments are now popular all over the world.

This service is very popular as it is less damaging to the hair than straightening and improves shine and texture.

If you are thinking of trying hair smoothing in the future, please refer to this article.

What is a hair smoothing treatment?

Hair smoothing treatment, also known as a keratin treatment or Brazilian blowout, is a popular hair care procedure that aims to reduce frizz, increase shine, and make hair more manageable. It’s particularly beneficial for individuals with curly, frizzy, or unruly hair. The treatment involves applying a specialized formula to the hair that typically contains keratin, a protein that is a major component of hair, skin, and nails.

What is the difference between hair smoothing treatment and hair straightening?

Hair smoothing treatment and hair straightening are both hair care procedures designed to alter the texture of the hair, but they have distinct differences in terms of their goals, methods, and outcomes:

Hair Smoothing Treatment:

  1. Goal: The main goal of a hair smoothing treatment is to reduce frizz, enhance shine, and make the hair more manageable. It aims to improve the overall texture of the hair while retaining some natural wave or curl.

  2. Method: Hair smoothing treatments typically involve the use of a formula that contains ingredients like keratin to fill in gaps and rough spots in the hair cuticle. This results in a smoother and more polished appearance without completely straightening the hair.

  3. Outcome: Hair smoothing treatments lead to smoother, shinier, and more controlled hair. The hair retains some of its natural texture, meaning that if your hair is curly, it will still have curls, but they will be more defined and less frizzy.

  4. Durability: The effects of a hair smoothing treatment usually last for a few weeks to a few months, gradually fading as the treatment wears off.

Hair Straightening:

  1. Goal: Hair straightening, as the name suggests, aims to completely straighten the hair, eliminating any natural waves, curls, or kinks. The goal is to achieve a sleek and entirely straight look.

  2. Method: Hair straightening methods often involve the use of chemicals or heat to break down the hair’s natural structure. This can include relaxers (chemical treatments that permanently alter the hair’s structure) or heat styling tools like flat irons.

  3. Outcome: Hair straightening results in completely straight hair with minimal to no natural texture. The process is more intensive and permanent compared to hair smoothing treatments.

  4. Durability: Depending on the method used, hair straightening can be permanent (as with some chemical relaxers) or temporary (as with heat styling). Permanent straightening methods require touch-ups as the hair grows out.

In summary, the main difference between hair smoothing treatments and hair straightening lies in the final texture and outcome.

Hair smoothing treatments aim to control frizz and improve manageability while maintaining some natural texture, while hair straightening methods are designed to completely eliminate natural texture and create a sleek, straight look.

It’s important to consult with a professional stylist to determine which option is best suited to your hair type, desired outcome, and preferences.

What hair types are suitable for hair smoothing treatment?

If one or more of the following applies to you, we recommend a hair-smoothing treatment!

Check which one applies to you.

People who want to straighten their hair with as little damage as possible.

Hair smoothing treatments are also recommended for those who are concerned about damage, as they are much less harsh on the hair.

people who have alkali hair straighteners, although their frizz is not that strong.

It is also suitable for people whose hair is not that frizzy and who want to improve the shine and feel of their hair.

sensitive hair

I think some people have always had sensitive hair. They have hair that is prone to dryness and spread ends easily. For such people, hair straightening with alkaline agents is better than straightening with alkaline agents.

For people with sensitive hair, be careful not to use any pre-treatment or special treatment to reduce damage, such as colour or perms, other than straightening, as they are prone to breakage and hair falling apart if they do not take good care of their hair while doing so.

Hair smoothing doesn’t work? Does it damage your hair?

Among those who experienced hair smoothing,

  • Did not feel it was very effective
  • Hair quality did not change
  • hair was damaged
  • It became difficult to manage

These are very often caused by errors in treatment or inexperience by the hairdresser in charge.

To determine whether hair smoothing is suitable, it is essential to have a thorough consultation with the customer and propose a treatment tailored to each individual’s hair type.

How often do I have to have my hair smoothing?

Hair smoothing is less likely to cause damage, but it should not be overdone.

Recommendations depend on the length of your hair and the strength of your hair’s kinks, so use the following figures as a guide.

  • Short hair – every 2-4 months
  • Medium hair – every 3-5 months
  • Long hair – every 4-6 months

In the case of short hair, the hair is short and it is easy for the shape of the hairstyle to change as the hair grows a little longer.

In comparison, with long hair, the overall form is less likely to change than with short hair because the hair is long and the weight of the hair pulls the root part of the kinks out.

Of course, it depends on the strength of each person’s kinks and the design of the hairstyle, but the above pace is probably the most common.

What if the hair smoothing treatment fails?


We see many people fail in hair smoothing.

Hair becomes stiff.
Hair spreads easily
Hair ends become unruly
Hair becomes dry

Thus, the most important thing to avoid hair smoothing mistakes is to find an experienced hairdresser or hairdressing salon and ask for help.

How to do hair smoothing treatments.

The process generally involves the following steps:

  1. Preparation: The hair is shampooed and sometimes clarified to remove any buildup or residues.

  2. Application: The smoothing treatment solution, often containing a blend of keratin and other ingredients, is applied to the hair evenly, coating each strand.

  3. Processing: The hair is then left to process for a specific period of time. During this time, the keratin and other ingredients are absorbed into the hair shaft.

  4. Heat Application: After processing, the hair is blow-dried and then flat-ironed to lock in the treatment. The heat from the flat iron helps to seal the product into the hair cuticle, creating a smoother texture.

  5. Rinse: Depending on the specific treatment, the hair may or may not be rinsed at this point.

  6. Final Styling: The hair is blow-dried and styled as desired to showcase the smoothing effect.

The treatment’s main goal is to fill in the gaps and rough spots in the hair’s cuticle layer, which helps to create a smoother, sleeker appearance. It can make hair more manageable, reduce styling time, and provide a shiny and polished look. The effects of a hair smoothing treatment can last anywhere from a few weeks to a few months, depending on the specific treatment used, hair type, and aftercare.

It’s important to note that some hair smoothing treatments contain formaldehyde or similar chemicals, which can be a concern due to potential health risks associated with inhaling these substances during the treatment process. In recent years, there has been an increasing demand for formaldehyde-free and safer alternatives.

If you’re considering a hair smoothing treatment, it’s recommended to consult with a professional stylist who can provide you with information about the specific treatment options available, as well as any potential risks or side effects.

Hair smoothing treatment before and after 

Hair smoothing treatment×bob

From dry and spreading hair ends to shiny bobbed hair.

Hair smoothing treatment×coloured hair

This customer has always had sensitive hair and did not want to damage it. The finished hair is shiny and straight.

Hair smoothing treatment × damaged hair

This customer’s hair was weakened by repeated straightening and colouring.

This time, hair smoothing was used to improve the feel and appearance of the hair.

hair smoothing treatment×bleached hair

This customer, who has bleached her hair in the past, has a problem with her hair catching.
Hair smoothing can be done on bleached hair, which greatly improves the quality of the hair.

The best place for hair smoothing treatment in London

Baroque hair and nails is a Japanese-owned hair salon in London and Tokyo.

Hair smoothing treatments, hair straightening, digital perms and colour are also popular.

If you are looking for a good hair salon in London, please visit our salon.




4 Pollen St London W1S 1ND

English Line 020 7629 3940
Japanese Line 020 7491 2209

Follow Us


〒150-0001 Tokyo, Shibuya City, Jingumae, 3 Chome 5-10 2F
〒150-0001 東京都渋谷区神宮前3丁目5-10 2F

English & Japanese Line 03 5411 3011

Follow Us