4.4 Shampooing, Conditioning & Scalp Treatments
Key Takeaways
- Brushing before shampoo starts at the ends and works up to the scalp to detangle without pulling or breakage
- Use warm (not hot) water, around 38°C, to cleanse without stripping scalp oils or irritating the skin
- Healthy hair and skin sit at pH 4.5-5.5; alkaline shampoo opens the cuticle to cleanse, acidic conditioner closes and seals it
- Shampoo types include clarifying, balancing, moisturizing, and medicated; match the type to the client's hair and scalp condition
- Always drape and protect the client before any wet service to keep them dry and comfortable
Shampooing, Conditioning & Scalp Treatments
Quick Answer: Shampooing begins with brushing and detangling from the ends up, uses warm (not hot) water, and matches product to the client's hair and scalp type. The pH scale governs the whole process: alkaline shampoo opens the cuticle to cleanse, acidic conditioner closes and seals it. Always drape and protect the client before any wet service.
Pre-Service: Brushing and Detangling
Before any wet service, brush and detangle the client's hair. Proper brushing:
- Distributes scalp oil (sebum) from roots to ends, naturally conditioning the hair
- Stimulates scalp circulation, which supports follicle health
- Removes surface dust, loose flakes, and loose hair shed during the telogen phase
- Loosens light product buildup before water touches the hair
Always begin at the ends and work upward toward the scalp. Starting at the roots pulls tangles tighter and causes breakage and client discomfort. Hold the hair mid-strand to support it while you work out the ends first, then move gradually up to the roots.
Water Temperature
Use warm water, never hot. Hot water:
- Strips natural oil, leaving hair dry and dull
- Can irritate or scald the scalp
- Raises the cuticle excessively, increasing porosity and frizz
Warm water (around 38°C / 100°F) cleanses effectively while protecting the cuticle and scalp. A cool final rinse helps close the cuticle and adds shine.
The pH Scale and Product Selection
The pH scale runs from 0 to 14: 7 is neutral, below 7 is acidic, above 7 is alkaline. Healthy hair and skin sit naturally around pH 4.5-5.5 — slightly acidic.
| Product pH | Effect on Hair |
|---|---|
| Acidic (below 7) | Closes/seals the cuticle; smooths and shines; the basis of conditioner and final rinses |
| Neutral (7) | Balanced; gentle; suitable for normal hair and daily use |
| Alkaline (above 7) | Opens the cuticle; cleanses and lifts oil and buildup; the basis of clarifying shampoo, perm solution, relaxer |
This is why a typical shampoo service pairs an alkaline (cleansing) shampoo with an acidic (sealing) conditioner: the shampoo opens the cuticle to remove oil and product, and the conditioner closes it back down so the hair is smooth, shiny, and protected.
Shampoo Types
| Shampoo Type | Use | Hair/Scalp Type |
|---|---|---|
| Clarifying | Deep cleanse; removes product buildup and excess oil | Oily hair; occasional use on normal hair; not for color-treated or dry hair |
| Balancing | Normalizes oil without stripping | Normal-to-oily scalp; gentle regular use |
| Moisturizing | Adds hydration and softness | Dry, coarse, color-treated, or chemically processed hair |
| Medicated | Addresses specific scalp conditions (dandruff, psoriasis) | Per product directions and client need; may be OTC or recommended by a physician |
Conditioning Types
| Conditioner Type | Purpose | How Used |
|---|---|---|
| Rinse-out conditioner | Closes cuticle after shampoo; detangles; everyday use | Apply mid-strand to ends; rinse after 1-3 minutes |
| Deep / protein conditioner | Rebuilds cortex; restores strength and elasticity | Apply after shampoo; process 10-20 minutes with heat; rinse |
| Leave-in conditioner | Ongoing moisture and protection; heat protection | Apply to towel-dried hair; do not rinse |
Application Technique and Sectioning
A professional shampoo service follows a consistent method:
- Drape and protect the client — towel and cape positioned to keep the client dry and comfortable
- Section the hair if needed to ensure even product distribution
- Wet the hair thoroughly with warm water
- Apply shampoo to the scalp in small amounts; emulsify with palms
- Massage the scalp using fingertips (not nails) in a gentle, circular motion — stimulates circulation and loosens soil without scratching
- Rinse completely until water runs clear
- Repeat if the hair was very soiled or had heavy product buildup
- Apply conditioner to mid-strand and ends (avoid the scalp unless directed), comb through, and rinse
Scalp Treatments
Targeted scalp treatments address specific conditions:
- Dry scalp oil treatment — warm oil massaged into the scalp to soften and moisturize; followed by gentle shampoo
- Normalizing treatment — balances an oily scalp; astringent or clarifying products reduce excess sebum without over-stripping
- Medicated scalp treatment — for dandruff or persistent conditions; used per product directions and within scope of practice
Always confirm the scalp is healthy enough for the treatment, perform the analysis, and avoid any product or technique on broken or inflamed skin.
Draping and Client Protection
Before any wet service, drape the client with a towel and waterproof cape to protect their clothing and skin. Proper draping:
- Keeps the client dry and comfortable
- Prevents product from running down the neck
- Signals professionalism and care
Loose, hot, or misplaced draping causes discomfort and undermines the service experience — secure it before water touches the hair.
On the pH scale, what pH range is considered normal and healthy for hair and skin?
When brushing hair before a shampoo, where should you begin, and why?