| What it does to the bond | Softens the bonds and resets them straighter under tension and heat, then neutralises to fix the new shape. | Breaks the disulphide bonds open, sets the hair completely straight while they are open, and reforms them in that position. |
| The finish it produces | Straight from the mid-lengths down with body at the root; relaxed rather than pressed, and it still moves. | Pin-straight root to tip, flat at the crown, identical in any weather and with no styling at all. |
| The hair it suits most naturally | Lightly wavy to medium curly, thick and in good order — and a guest who wants the result to read as their own hair. | Very curly or coarse hair in strong condition throughout, where pin-straight is genuinely the brief. |
| On tightly curled hair | Relaxes it considerably, but the result is usually a loose wave with real body and it will still want ironing to look completely straight. | This is the service that delivers straight on hair like that — provided the condition and the elasticity hold under testing. |
| On fine or sparse hair | Possible where the condition allows, but fine hair is read carefully — a relaxed length on already-limp hair buys little. | Usually declined. It removes volume by design, so fine hair ends up looking flatter and sparser rather than sleeker, and it is structurally less able to take an open-bond process. |
| The regrowth line | Soft at first, clearly visible within a few months on most growth rates. Three honest options: treat the roots, cut the treated length off over time, or wear the contrast. | Sharper than any other treatment here, precisely because the treated hair is perfectly straight. Root work at intervals is part of the service being sold, not an extra. |
| Time in the chair | Three to five hours, decided by length, density and how resistant the hair is. The neutralising step is never hurried. | Four to seven hours. Neither the processing checks nor the neutralising can be shortened, and the setting stage is the longest of all. |
| What it does to colour afterwards | The hair is more porous: it takes tone faster, can go darker or cooler than expected, and loses the tone sooner. Colour is planned as one sequence with the smoothening. | Cautiously, and never with bleach. A deposit-only tone after a proper gap; lightening, highlights and balayage are not offered on rebonded hair here. |
| The refusals | Bleached or highlighted hair, henna in the history, hair that is shedding or breaking, an uncertain guest, a sensitive or broken scalp, another chemical service in the last several weeks. | All of the same, applied more strictly — bleach in any proportion is a flat no — plus guests who mainly want frizz control, and a fourth or fifth round on hair that has carried the process for years. |
| What you take on afterwards | Sulphate-free and salt-free shampoo, conditioner at every wash, deep conditioning in the routine, trims, and root work done where your record is held. | The same list, permanently and without exception, plus a regular mask schedule and a trim interval — because rebonded ends split more readily and a split travels upward faster. |
| If you change your mind | The treated length keeps its shape until it is cut. Growing it out or cutting it shorter are the two routes. | The same two routes, and nothing else. There is no treatment that puts the curl back, and perming rebonded hair is asking a weakened structure to survive the same process twice. |