Shampooing, Conditioning, and Scalp Care
Shampoo chemistry and selection
Hair and scalp sit at a mildly acidic pH (roughly 4.5–5.5). Alkaline shampoos swell the cuticle and clean aggressively; acidic and balanced shampoos help the cuticle lie flat and preserve color. Match the product to the need:
- Clarifying - removes buildup from heavy product or hard water; not for daily use on dry hair.
- Balancing - for oily scalps with dry ends.
- Moisturizing/hydrating - for dry, porous, or chemically treated hair.
- Volumizing - lighter formula with less conditioning weight.
- Medicated - for specific scalp conditions; it manages, it does not cure.
Use moderate water temperature - hot water strips color and oils and irritates the scalp. Work shampoo through the scalp and let suds flow through the ends.
Conditioning and scalp care
Conditioners combine humectants (draw moisture), emollients (soften and add shine), and proteins (temporarily patch the cuticle). Too much protein makes hair stiff and brittle; too much moisture makes it limp and gummy. Balance is the point. Scalp massage manipulations include effleurage, petrissage, tapotement, and vibration, always applied with consistent pressure and in the direction of the service plan.
Traps to expect
Questions often imply a medicated shampoo cures dandruff, or that hot water "opens the cuticle to clean better." Both are wrong. Another trap: over-proteinizing is as damaging as under-moisturizing.
Worked example
A client with an oily scalp and dry, highlighted ends. Rule of thumb: treat the two zones separately - balancing shampoo at the scalp, hydrating conditioner mid-shaft to ends.