Hair salon in Olbia · Total Look
Studies & guides
Four guides written by our salon with verified sources — dermatology, peer-reviewed journals, EU regulation and professional textbooks. Because a good hairdresser should know the why, not just the how.
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The science of shampoo
How shampoo really works: surfactants, pH, sulfates and wash frequency, explained with dermatology sources and peer-reviewed studies.
→The science of hair colour
Colour chemistry: oxidation, PPD, developer volumes, melanin, allergies and EU regulation — with scientific and regulatory sources.
→Cutting techniques
Professional haircutting explained: Vidal Sassoon's geometric revolution, elevation and graduation, scissors vs razor, dry cutting for curls.
→Becoming a hairdresser
Hairdresser training compared: Italy's Law 174/2005 and abilitazione, Germany's dual system and Meisterbrief, the UK and US licensing models.
→Why we publish studies
Behind every service there is chemistry, anatomy and technique. Publishing what we study — sources included — is our way of demonstrating professional rigour and helping you make informed choices about your hair. Every claim in these guides links to an authoritative, verifiable source.
Last updated: June 2026