REAL CLIENT CASE · KOREAN COLD PERM · 25 MM S-WAVES
The client arrived with long, very straight hair and a history of lighter highlights. She wanted a layered shape with natural S-waves and a relaxed, slightly undone finish that would not depend on intensive blow-drying every day. Oilly combined a layered haircut with a Korean-style cold perm using 25 mm rods, adapting the design and processing approach to the hair’s previous colour history.
Long, very straight brunette hair with previous lighter highlights
Layered haircut and Korean-style cold perm with 25 mm rods
Loose S-waves with airy separation and a relaxed silhouette
Damp Result · Back
Damp Result · FrontThe client wanted to move away from a very straight silhouette and give the hair more personality. Her goal was not a polished, rigid curl set, but soft waves that would make the haircut feel freer, more dimensional and slightly undone.
Before the service, the hair fell in a predominantly straight line. Warm brunette colour and lighter highlighted pieces were visible through the lengths, so the existing chemical history had to be considered before the cut and perm pattern were planned.
Before · Straight HairThe haircut was shaped with layers first, giving the new waves room to separate and move instead of sitting as one heavy block. Oilly then used 25 mm rods with a Korean-inspired placement pattern to create broader S-shaped movement rather than small, tightly repeated curls. Rod diameter was only one part of the design: section size, direction, placement and the way each rod connected with the haircut all influenced the result.
Because the hair had been highlighted and coloured before, Oilly adjusted the product selection and processing approach around its condition instead of treating every section in exactly the same way. The damp finished result retained a soft, flexible appearance with visible shine and movement. Suitability for a cold perm or any future chemical service must still be reassessed according to the hair’s condition at each appointment.
This wave pattern was designed for a client who preferred not to blow-dry or heavily set the hair every day. At home, a small amount of curl-defining product or lightweight oil can be worked through the lengths to help the waves group together. The exact finish still depends on the client’s natural hair, aftercare and the way the waves are arranged while drying.
The completed look gives the long hair a more relaxed silhouette, with loose S-waves, visible separation and softer movement around the face. These photographs show the result while the hair is still damp after the service. Cold-perm results are not one-size-fits-all: larger or smaller rods and a different placement pattern can be selected according to the preferred wave size, hair length, density and daily styling habits.
No. Curl size and overall shape depend on rod size, sectioning, placement and haircut design. Larger rods and customized placement can create broader, more natural-looking waves.
It depends on the hair’s current condition and chemical history. A professional assessment is necessary before the service, and the technique may need to be adjusted or declined if the hair is not suitable.
This case was designed for a simpler, air-dry-friendly routine. The exact finish still depends on natural hair characteristics, aftercare and how the waves are arranged while drying.
Use a small amount of curl-defining product or lightweight oil through the lengths, then arrange or gently scrunch the waves as instructed by the stylist. Avoid overloading the hair with product.
Send Oilly Hair Salon a current photo of your hair and a reference for the wave size you prefer. The team can assess your haircut, colour history and daily routine, then discuss a rod size and placement plan suited to your hair.