Semi-definitive: get to know this straightening technique and get your doubts cleared

There are several permanent hair straightening chemistries, and one of them is semi-permanent. The procedure promises to leave the strands smooth and less voluminous, while preserving the structure of the locks. Are you thinking of doing it on your hair? Check out the precautions to be taken and the step by step of how it is done.

What is the difference between semi-definitive, definitive and progressive?

According to hairdresser Edson Idogawa, from Hair Studio Anzen, there are differences both in the ways of doing and in the effects of these straightening. On the final brush, a smoothing product is applied, then rinsed with water, brushed and finished with a neutralizer. The effect of this process, as the name suggests, is definitively and irreversibly smooth hair.

In progressive, the structure of the wires is modified in order to leave them with less frizz and volume. The procedure does not last as long as the permanent one, but the locks become smoother as the method is repeated over the years.

The semi-definitive is similar to the progressive, but the wires tend to be less damaged, because, during the chemical process, a cuticle sealant is used before making the brush or the board. Thus, the result is smoother and more silky locks, compared to other straightening treatments.

Everything you need to know about the semi-final

The semi-definitive is indicated for people who want to have extremely smooth locks, but keep the hair structure to a minimum. According to the specialist, it is less aggressive because the straightening products that soften the strands are washed, and there is a sealing of the hair fiber before straightening with the brush and the board.

According to Edson, the semi-definitive lasts until the root grows and then it is necessary to repeat the procedure on the part without the straightening chemical. He warns that washing your hair too often can cause the straightening to wear off faster, and washing your hair right after the procedure is optional. It is possible to finish with the brush and the board or with the washed highlights.

Care of the semi-final

• Do the procedure with a specialist: performing the procedure with a good professional is essential for your hair to remain minimally healthy. It is an aggressive chemical process that alters the structure of the hair. Doing it amateurishly can result in a chemical cut.
• Choose good products for chemistry: in addition to choosing the salon, be aware of the products used in the procedure. Each brand contains different actives, and some, like thioglycollates and guanidine, are incompatible with other chemicals you may already have in your hair.
• Follow the product manufacturer’s instructions: it is essential to follow the instructions described on the product packaging, whether the pause time or the application method. This tip applies even to professionals.
• Invest in a hair reconstruction: as the fiber of your hair will be softened, it is important to do a reconstruction to restore the nutrients of your locks and restore their health. Skipping this step can result in brittle strands without the desired smooth effect.
• Follow a hair schedule: in addition to reconstruction, it is very important to moisturize and nourish hair frequently. Interleaving these steps will ensure a healthier and recovered hair.

It is not such a simple procedure and, therefore, following these precautions is essential to ensure that the semi-definitive works well and lasts longer.

How is the semi-final made?

To understand how the semi-definitive works, check out the step-by-step procedure, explained by the hairdresser:

1. Apply the straightening product

Start by applying the straightening product (also called semi-definitive) strand by strand. These assets are responsible for softening the hair structure and leaving it ready to be modified.

2. Wait for the pause time

Wait for the pause time indicated on the packaging for the product to take effect. Attention: leaving it on for a long time can weaken the locks and cause a chemical cut.

3. Wash the hair with anti-residue shampoo

One of the differences from the definitive brush is at this stage. So that the action of the straightener is less aggressive, the strands are washed before going through the straightening with the brush and flat iron.

4. Apply a sealant

This step also characterizes the semi-definitive. The hair cuticles, softened, are sealed before receiving a heat source that leaves the hair smooth.

5. Dry the wires

Before the brush and flat iron, it is advisable to dry the hair completely. This is recommended because wet strands tend to become elastic and break more easily.

6. Straighten the wires with a brush and flat iron

Finally, straighten the strands the way you want them to be permanently. The recommendation is to make a brush and then plank strand by strand. Washing after all this procedure is optional. Attention: after this chemistry, it is not possible to change the structure of the wires and make them go back to the initial stage.

As you’ve seen, the semi-fine really leaves the strands permanently straight and isn’t as aggressive. However, it is necessary to be attentive to the products and techniques used and not neglect the wires! And if you don’t give up your straight locks, check out homemade straightening recipes with Maizena.