Less curl · less frizz · roots after 4–8 months
Keratin treatment & Brazilian blow dry in London (Straightment Demi)
DOWNStraightment Demi — about 60% of the curl out, roots after 4–8 months
Your own hair, minus the fight. About 60% of the curl gone, it dries near-straight on its own, and there's no line to grow out.
From The Brief
He just didn't want to look rebellious
Straightment Demi · ↓ DOWN TREATMENT · c7 → s2 · from the archive, Nov 2025
Watch on YouTube →My work, step by step
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Step by step created by Zoltan at Compton, around 2009. The keratin treatment, step by step →
At a glance
What's the Zoltan tecSture Scale™? →- 2–3 levels
- straighter on the Scale
- 4–8 months
- roots, when clients come back
- Frizz out
- root to end
- ~60%
- of the curl out
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
Example: hair at level 8 (black). Demi typically moves it to the dark blue; pale blue is the most it can go. 1 is dead straight, 10 the tightest zigzag.
How long it lasts
As long as you like it. Everyone's expectations are different. These are when my clients usually come back.
Semi
Smooth and shiny, frizz gone
Softening: most clients come back at 1–4 months
Back to your own hair, no line
Your own hair
Demi
Looser, softer, dries near-straight
Same as week one
Roots showing: most clients come back at 4–8 months
Lengths still loose; roots due
Permanent
Straight
Same as week one
Lengths straight; roots growing
Roots only, when you want them: most clients at 6–18 months
New growth at the root
Read the full guide: keratin treatment →Read the full guide: Brazilian blow dry →
Don't take my word for it
Straight talk before you book
- It'll pong a bit and the iron might smoke. Nobody's died.
- Some systems shift your colour. You'll hear it from me before, not after.
- What comes out stays out. It won't go poker straight either, and that's the point.
- Hair that's already been through the wars? Then it's a no. Or a not yet.
Don't cook your hair.
Home care
You care about your hair? Prove it.
The treatment's done. What you use at home decides how long it lasts.
As seen in
All press →Not ready? Fair enough.
Online consultation £9.95 from anywhere, or in person £74.95.
Book a consultationOther ways: Find my hair typeEvery treatment explainedContact
Founder of Compton Hair, my London salon group, from 2002 →Doing this since Compton, 2002 →The keratin I brought to the UK in 2010: Eternity Liss →