Boar bristles, with a diameter of 50–80 µm and a scaly surface that mimics the hair cuticle, mechanically distribute sebum from the roots to the lengths, reducing tip dryness without any product addition. Hairswiss analyzes the physics of brushing and the interaction between bristle fibers and the hair fiber.
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Blue-Violet Pigments in Neutralizing Shampoos: Chemistry of Chromatic Subtraction on Bleached Hair
Blue-violet pigments in neutralizing shampoos work by color subtraction: crystal violet or anthraquinone molecules (maximum absorption at 580–600 nm) neutralize the yellow-orange reflections (580–600 nm) of bleached hair through light interference. Hairswiss explains the chemistry of direct pigments and their deposition mechanism on porous fibers.
Para-phenylenediamine: The Chemical Ingredient that Colors Hair
Para-phenylenediamine (PPD, MW 108 Da) is a primary aromatic amine used as an oxidative pigment precursor in permanent hair dyes. Its small molecular size allows it to penetrate the hair cortex, where it couples with couplers under hydrogen peroxide action to form large colored molecules. It is also one of the most frequent contact allergens in cosmetics — through T-lymphocyte sensitization. Hairswiss analyzes its chemistry, coloring mechanism and documented dermatological risks.
Artificial Intelligence and Professional Hair Care Distribution: What Changes for Hairdressers
The introduction of artificial intelligence into the distribution of professional hair care products is shifting the selection criterion: from commercial relationships toward formulatory transparency. Hairswiss analyzes how algorithmic recommendation systems process INCI data, cosmetic functions, and chemical compatibility — and what this changes concretely for Swiss hairdressers.
Hair Gel: Polymer Chemistry, Hold Mechanism and Professional Guide
Hair gel is an aqueous polymeric formulation — typically acrylates, PVP or carbomers — that creates a flexible hold film on the hair fiber as it dries. Hold level depends directly on polymer concentration and molecular weight. Hairswiss analyzes the exact chemistry, the deposition mechanism on the cuticle and the professional selection criteria based on fiber type and desired result.
Scalp Care Products: Skin Barrier Chemistry and Professional Actives
The scalp is a distinct ecosystem: its pH (4.5–5.5), hydrolipidic film, and specific microbiome differentiate it from facial skin. Effective actives — zinc PCA, salicylic acid, ceramide complexes, growth factors — act on distinct molecular targets depending on the dysfunction being treated. Hairswiss analyzes scalp formulations and professional selection criteria.
Organic and Bio Hair Care Products: Certifications, Formulation and Comparison with Conventional Formulas
Organic or bio hair care products are not a homogeneous chemical category: they are defined by certification frameworks (COSMOS, Ecocert, NATRUE) that impose naturalness thresholds and plant-origin requirements on ingredients. Hairswiss explains what these certifications concretely imply for formulation and analyzes performance differences compared to conventional formulas.
LAURAMIDOPROPYLAMINE OXIDE: A Key Ingredient in Hair Care
Lauramidopropylamine Oxide is an amphoteric surfactant derived from lauric acid (C12) — a tertiary amine oxide that adopts a cationic charge at acid pH and anionic charge at alkaline pH. This amphoteric nature gives it remarkable compatibility with anionic surfactants (SLS, SLES), reducing their cuticular irritation and improving formulation viscosity. Hairswiss analyzes its chemistry, conditional foaming mechanism and role in professional shampoos.
Summer Hair Protection: UV, Chlorine and Sea Salt — Degradation Mechanisms and Protective Actives
In summer, three chemical agents act simultaneously on the hair fiber: UV radiation (photo-oxidation of melanin and protein chains), chlorine (oxidizing agent that degrades disulfide bonds), and sea salt (high hygroscopicity that fragments dry cuticles). Hairswiss explains the degradation mechanisms and relevant protective actives.
The Three Hair Types: Molecular Basis of Hair Fiber Curvature and Formulation Implications
Hair types (straight, wavy, curly) are not an aesthetic classification: they reflect the elliptical shape of the follicle and the asymmetric distribution of disulfide bonds in the cortex. This geometry directly influences porosity, mechanical resistance, and response to cosmetic actives. Hairswiss explains the molecular basis of hair curvature and its implications for formula selection.
Cyclomethicone: Chemistry of Volatile Silicones, Evaporation Mechanism and Role in Hair Formulation
Cyclomethicone is a light cyclic silicone (D4: MW 296 Da, D5: MW 370 Da, D6: MW 444 Da) with high volatility: it evaporates completely within 30–60 seconds of application, leaving no residue on the hair fiber. This property distinguishes it from heavy silicones (dimethicone) and makes it the preferred carrier for light styling actives. Hairswiss analyzes its chemistry, evaporation mechanism and the regulatory questions surrounding D4 and D5.
Professional vs Consumer Hair Products: Differences in Active Concentration and Formulation
Professional products used in salon differ from consumer ranges in active concentration, formulation precision, and fiber deposition technology. A professional conditioner typically contains 3–5% BTAC versus 0.5–1% in consumer versions. Hairswiss analyzes concrete formulation differences and explains why active concentration determines the result.
Natural and Artificial Curly Hair: Molecular Differences and Care Implications
Natural and artificially created curly hair differ structurally: in the former, curvature is determined by the asymmetric cross-section of the follicle and the inhomogeneous distribution of disulfide bonds in the cortex; in the latter, it results from a controlled chemical breaking and reformation of those bonds. Hairswiss analyzes the molecular differences and their implications for product selection.
Echinacea purpurea: Phytochemical Chemistry, Hyaluronidase Inhibition and Role in Hair Cosmetology
Echinacea (Echinacea purpurea) contains caffeoylquinic acids (chicoric acid, MW 474 Da) and alkylamides (MW 200–350 Da) that inhibit hyaluronidase — the enzyme that degrades hyaluronic acid in the extracellular matrix of the perifollicular dermis. This anti-hyaluronidase activity preserves the integrity of the extracellular matrix of the dermal papilla. Hairswiss analyzes the phytochemical composition and mechanism of action in hair cosmetology.
Hair Lamination: Chemistry of the Protective Film, Mechanism of Action and Professional Guide
Hair lamination is a cosmetic technique that deposits on the hair fiber a film of film-forming polymers — primarily chitosan, hydrolyzed proteins and cationic polysaccharides — adsorbed by electrostatic attraction onto the negatively charged cuticle. An additive and reversible technique, chemically distinct from nanoplasty and keratinizing treatments. Hairswiss analyzes the mechanisms and active ingredients.
Hydrolyzed Wheat Protein: Chemistry of Peptides, Site of Action and Role in Hair Conditioning
Hydrolyzed wheat proteins are peptides of 300 to 5,000 Da obtained by acid or enzymatic hydrolysis of gluten. Their molecular weight determines the site of action: fractions 1,000 Da adsorb onto the cuticle. Rich in glutamine and proline, they reduce differential porosity and improve fiber elasticity. Hairswiss analyzes their chemistry and mechanisms of action.
Guarana (Paullinia cupana): Chemistry of Methylxanthines and Mechanism of Action on the Hair Follicle
Guarana (Paullinia cupana) is a plant-based caffeine source at high concentration (2.5–5.8% dry weight) — 2 to 5 times more than coffee beans. In hair cosmetology, its methylxanthines inhibit phosphodiesterases (PDE), increasing cAMP in follicular matrix cells and stimulating their proliferation. Hairswiss analyzes the biochemical composition and mechanism of action on the hair follicle.
Polyquaternium: Chemistry of Cationic Polymers, Mechanism of Action and Role in Hair Care
Polyquaterniums are water-soluble cationic polymers whose positive charge allows them to adsorb electrostatically onto the negatively charged hair cuticle. Polyquaternium-7, -10, -32, -37, -55: each number designates a distinct chemical architecture with different film-forming, antistatic and conditioning properties. Hairswiss analyzes their molecular mechanisms and how to identify them in an INCI list.
Capillary Oxygen Therapy: Follicle Biochemistry, Vasodilatory Actives and Professional Analysis
Capillary oxygen therapy is rooted in the vascular physiology of the hair follicle and the biochemistry of mitochondrial oxidative phosphorylation. Vasodilatory actives — menthol (TRPM8 receptors), caffeine (PDE inhibition) and niacinamide (NAD⁺ precursor) — indirectly improve follicular oxygenation by increasing perifollicular microcirculation. Hairswiss analyzes the molecular mechanisms and scientific limits of these protocols.
Hairspray: Chemistry of Film-Forming Resins, Hold Mechanism and Professional Guide
Hairspray is a dispersion of film-forming resins — primarily VP/VA copolymers or acrylates — in alcoholic or aqueous suspension. On drying, these resins polymerize on the hair surface and create a rigid network that holds the style. Hairswiss analyzes the exact chemistry, the differences between gas-propelled and eco pump formulations, and professional selection criteria based on fiber type.