NEWS

With “Glass Hair” and ultra-sleek aesthetics dominating London Fashion Week, achieving a mirror-like reflection is the ultimate 2026 hair goal. 🪞🪄 However, when it comes to long-lasting smoothness, choosing the right treatment can be tricky. Should you go for a Japanese Straight Perm or a Keratin Treatment? Let’s break down the science so you can find your perfect match.

🧬 The Ultimate Showdown: How They Work

Feature	Japanese Straight Perm (Thermal Reconditioning)	Keratin Treatment (Smoothing / Brazilian Blow-Dry)
What it does	Permanently alters the hair’s internal bonds to make it pin-straight.	Temporarily coats the outer cuticle layer with protein to smooth it out.
The Vibe	Sharp, architectural, flawlessly straight “Liquid Hair”.	Softer, voluminous, frizz-free but retains natural wave.
Longevity	Permanent on treated hair. It only goes away when it grows out.	Semi-permanent. It gradually fades evenly over 3–6 months.
Best For	Coarse, thick, curly, or stubborn frizzy hair.	Fine, slightly wavy, or bleached hair looking for repair.

🛑 Pros & Cons Breakdown

First, let’s look at the Japanese Straight Perm.

• The Pros: It offers true wake-up-and-go convenience. As a result, rain, London humidity, or gym sweat won’t make your hair frizz.

• The Cons: However, it is a major commitment. Because it alters the hair permanently, it cannot be reversed. Additionally, it is not suitable for heavily bleached hair.

On the other hand, consider the Keratin Treatment.

• The Pros: This is a great temporary option if you love your natural texture but want to eliminate frizz.

• The Cons: Conversely, it will not give you pin-straight hair if you have tight curls. Furthermore, it requires frequent salon visits to maintain.

🔍 Stylist Secret: Why Assort London Specialises Exclusively in the Japanese Straight Perm

At Assort London, we exclusively offer the Japanese Straight Perm for our texturising services. Why? Because our clients want high-performance results that stand up to the London drizzle.

Plus, our specialized Japanese formula does not just flatten your hair. Instead, it infuses deep conditioning agents while restructuring the bonds. Therefore, you get that coveted, healthy “Liquid Gloss” finish rather than a stiff, dry look. It is truly the ultimate investment for an effortless morning routine.

🧴 Post-Perm Care: How to Maintain Your Glass Finish

To keep your permanent straight hair looking silky and highly reflective, you must follow a few golden rules:

1. The 48-Hour Rule: First, do not wash your hair or get it wet for the first 48 hours. Similarly, avoid using hair ties or clips. This allows the bonds to lock perfectly into their new straight shape.

2. Sulfate-Free is Key: Next, always use sulfate-free, protein-rich shampoos. By doing so, you will protect the hair’s outer moisture shield.

3. Hydration First: Finally, apply deep conditioning masks once a week. Remember, straight hair reflects the most light when it is intensely hydrated from within!

⏳ Maintenance & Root Touch-Ups

Because the treated hair is permanently straight, it will never go wavy again. Nevertheless, your natural hair pattern will continue to grow at the roots.

Therefore, when should you return? Most of our clients come back for a root touch-up every 4 to 6 months. This timing depends on how fast your hair grows, as well as the contrast between your natural roots and the straight lengths.

✨ Book Your Smooth Hair Transformation

Ready to switch to a low-maintenance, high-shine lifestyle? Let our expert stylists evaluate your hair condition. Then, we will create the perfect sleek look tailored entirely to you.

👉 Book Your Next Appointment at Assort London! 🇬🇧

 Location: 81a Redchurch St, London E2 7DJ

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