Barber Life Academy · The Craft
Reading curls & cutting coily hair
Read pattern, density and porosity. Plan for shrinkage. Then cut coily hair clean and leave the skin calm. Textured hair walks in from every background, so this is a skill for every chair.
Why this skill pays
Curl isn't one group's hair. It shows up on clients of every background. The barber who reads it right, cuts it right and leaves the skin calm is the barber they stop shopping around for.
Schools are catching up. At least 8 states have passed laws adding textured-hair training to licensing programs, phasing in through 2026 (New York's took effect Sept 1, 2026). Washington's and Maine's include barbers. Texas isn't on that list, so the barber who learns it now is ahead. Sources: Professional Beauty Association via Cosmetics & Toiletries, Jul 2025; NY Dept. of State, Sep 2026; WA HB 1874 bill report; Maine LD 1861
Very tight coils.
Step one
The 1–4, A–C chart is a handy shorthand, not science. Researchers call it qualitative and vague, and one head often carries more than one pattern. Pattern is one read. Make all five.
Wave, curl or coil. Check the nape, crown and temples separately.
How many strands. Part it: if you see scalp easily, density is lower.
Roll one hair between your fingers. Barely there is fine; thread-like is coarse.
How fast it takes and loses water and product. More on that in slide 8.
Gently stretch a damp strand. Healthy hair springs back; if it snaps or stays stretched, go easy.
Sources: Gaines et al., Accounts of Chemical Research, 2023 (typing system is qualitative); De La Mettrie et al., Human Biology, 2007.
Shrinkage
Stretched or soaking wet, coily hair shows its true length. As it dries it springs back up. Stylists and brands put Type 4 shrinkage at roughly 50–75%, and some say up to 80%. We found no big lab study, so treat it as a range and measure the head in your chair.
Measure your client. Gently stretch one damp curl along a comb and note the length. Let it go and measure where it rests.
Shrinkage: 67%
Pick it out evenly first, then cut to the shape you see. Never pull a wet coil straight and snip it to the length they asked for. At 60% shrinkage, a 3-inch wet cut dries at about 1.2 inches.
Sources: Carol's Daughter hair guide (brand estimate, 30–75%); Charlotte Mensah in Hairdressers Journal (up to 80%). These are field estimates, not peer-reviewed measurements.
The consultation
Say these word for word. Each one changes what you cut, what you use, or what you skip. Flip a card to see why.
Sources: 16 TAC §83.102(b) (no services with ringworm, lice or broken skin); Ogunbiyi 2019 (about 1 mm); AAD, AKN self-care (don't shave the nape); AAD, Hairstyles that pull; Gavazzoni Dias 2015.
Prep and tools
Most bad coily cuts go wrong before the first pass: a rushed detangle, an uneven pick, a hot blade. Pick a tool or a tab.
If the comb stops, you stop. Hold the hair above the knot so the pull lands on your hand, not their scalp.
Sources: AAD, Habits that damage hair; Wong et al., Cutis, 2025.
Middle ground: damp hair, zero tension. Curl specialist Tippi Shorter's approach: cut wet, damp or dry depending on how much that hair shrinks and how the client wears it.
Sources: Behind the Chair, 10 tips for textured hair; Wong et al., Cutis, 2025.
| Guard | Leaves about |
|---|---|
| #1 | 1/8 in. (3 mm) |
| #2 | 1/4 in. (6 mm) |
| #3 | 3/8 in. (10 mm) |
| #4 | 1/2 in. (13 mm) |
| #8 | 1 in. (25 mm) |
Wahl guide-comb sizes. Other brands can differ slightly, so check yours.
Sources: Wahl guide combs and taper lever pages; 16 TAC §83.101, §83.102(e), §83.103 (Texas). Check your state's rules.
Texas says porous items the rules don't cover get thrown out after one client. Most twist sponges are porous foam, so plan on one per client or let the client take it home. Not sure? Ask TDLR.
Source: 16 TAC §83.102(d) (Texas). Check your state's rules.
Texas bars services where skin is inflamed, infected, broken, raised or swollen, or has an open sore. Let it calm down, and send stubborn cases to a dermatologist.
Sources: AAD, Razor bumps; Ogunbiyi 2019; 16 TAC §83.102(b), §83.103 (Texas).
The cut
Pick out evenly. Set the outline with a longer guard or clipper-over-comb in light passes. Take less than you think; you can always go again.
Set your guide line, then blend up one guard at a time and use the lever for half-steps. On coils, scalp contrast shows every line, so flick out and check from four angles.
Crowns swirl, napes and the area behind the ears often grow sideways or up. Clear bulk any way you need; close to the skin, go with the grain.
Bump-prone beard: leave about 1 mm with a guard. Bump-prone nape: the AAD says don't shave the back of the neck, so no razor and no skin-close taper there. Leave length with a guard.
Follow the natural hairline; never push it back for a line. Sharp: trimmer outline, razor detail only on calm skin. Soft: trimmer only, slightly rounded corners.
Sources: Ogunbiyi 2019 (1 mm, grain, no stretching); AAD, Acne keloidalis nuchae: causes and self-care.
Tap a number on the head to learn that zone.
Porosity
Porosity is how easily hair takes in and holds water, and it comes down to the cuticle. The float test mostly shows surface tension and oils, says chemist and science communicator Michelle Wong (PhD in chemistry). Test on the hair itself.
Product matcher
Layer order
General guidance, not a prescription: itching, flaking or hair loss that won't quit goes to a board-certified dermatologist. Sources: Wong (Lab Muffin), Hair porosity tests are a lie; NYSCC, An overview on hair porosity; Gavazzoni Dias, Int J Trichology, 2015; AAD, Black hair tips; Wong et al., Cutis, 2025 (wash rhythm); Dr. Crystal Aguh via HCPLive, Oct 2025; AAD, AKN self-care.
Myths and mistakes
Sources: Loussouarn, Br J Dermatol, 2001; Wong et al., Cutis, 2025; AAD, Habits that damage hair; AAD, AKN causes; British Association of Dermatologists, Tinea capitis.
A curl stretches to 6 inches and rests at 2 inches. What's the shrinkage?
A client gets bumps on the back of the neck and wants a crisp neckline. Your best move?
What's the most reliable way to judge porosity in the chair?
Done. You scored 0 / 3. Missed one? Go back over slides 4, 7 and 8.
Your move
Read it. Respect it. Cut what you see.
On your next five textured clients, write down pattern (by zone), density, strand thickness, porosity signs and elasticity before you touch a tool.
Stretch-test one curl at the nape, crown and front on three heads. Work out the shrinkage for each zone and compare them.
Pick out evenly and cut a round shape with clipper-over-comb. Check it from four angles. Time yourself, then beat it next round without losing symmetry.
0 / 8 done. Tick them off as you build the habit. Saved on this device.
The clippers are the easy part. If you can't name the pattern, density, porosity and shrinkage of the head in your chair, you're not ready to cut it yet.
Facts checked October 20, 2026. This lesson teaches technique; it isn't medical advice. Scalp and skin problems belong with a board-certified dermatologist.