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Brazilian Straightening: The Complete Guide 2026

Understanding the most in-demand salon technique

Rédaction ULTRALISS· Équipe éditoriale experte 18 July 2026 8 min read
Brazilian Straightening: The Complete Guide 2026 — illustration article Blog ULTRALISS
Key takeaways

Brazilian straightening is a smoothing treatment with hydrolyzed keratin that rebuilds and disciplines the fiber. It is suitable for curly to coily hair, lasts 3 to 5 months, and requires sulfate-free maintenance.

Contents (8)

What is Brazilian Straightening?

Brazilian straightening is a smoothing treatment based on hydrolyzed keratin that rebuilds the hair fiber while disciplining it. Unlike chemical relaxers, it does not break disulfide bonds: it coats the hair and reduces volume by up to 90%.

For which hair types?

Suitable for curly, frizzy, coily, colored, or sensitized hair. Customizable results: extreme smooth effect or softened curls depending on the processing time.

The professional protocol

1. Diagnosis and preparation

Clarifying shampoo 2 to 3 times to open cuticles and remove residue.

2. Application

Dry to 80%, apply strand by strand 1 cm from roots, processing time 30 to 60 min.

3. Drying and sealing

Complete drying then straighten with a ceramic iron at 200–230°C, 8 to 10 passes per strand.

Home care

  • Sulfate and salt-free shampoo for 3 months
  • Weekly nourishing mask
  • Avoid swimming pool and sea for the first 15 days

Duration and result

Results last 3 to 5 months depending on hair type and maintenance.

Frequently asked questions

Rédaction ULTRALISS

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