Is Preferance 1 Napoli safe for sensitive scalps or damaged hair?

The product contains ammonia, hydrogen peroxide, and fragrance allergens such as eugenol and linalool, which can provoke irritation on sensitive or compromised scalps; a 48-hour patch test is advised, and the dye is best suited for healthy hair rather than severely damaged or overly sensitive skin.

What role does ammonium hydroxide play in Preferance 1 Napoli's formula?

Ammonium hydroxide acts as an alkalizing agent that opens the hair cuticle, allowing the dye pigments to penetrate the cortex and achieve permanent color fixation.

How often should Preferance 1 Napoli be applied, and does it contain any controversial ingredients?

The dye is intended for single use per coloring cycle, typically repeated every 4 to 6 weeks as hair grows out; its formula includes ammonia, hydrogen peroxide, and fragrance components that are considered harsh or allergenic by some consumers, though it does not contain parabens or formaldehyde.

L'OREAL NORGE AS

Preferance 1 Napoli

Beauty

Product Insights

Preferance 1 Napoli is a professional permanent hair dye from L'Oreal Norway, designed for salon use to deliver vivid color results. The formulation combines conditioning agents such as cetearyl alcohol, glycerin, and oleyl alcohol with color developers like ammonium hydroxide and hydrogen peroxide to ensure effective pigment penetration and smooth post-color feel. However, it also contains high levels of fragrance, several known sensitizers (eugenol, linalool, resorcinol) and strong alkalizing agents, which may irritate sensitive scalps or cause allergic reactions, so a patch test is recommended before application.

Comparative Analysis

Preferance 1 Napoli occupies the high-end salon hair-color niche, offering a broad shade range and strong lift performance, but its chemistry is heavily synthetic compared with emerging natural or organic dye alternatives.

Ingredients

205712 1152439 1087166U AQU A / WAT E R, TRIDE C E T H - 2 CARBOXAMIDE MEA, PROPYLENE GLYCOL, HEXYLENE GLYCOL, PEG-2 OLEAMINE, POLYGLYCERYL-4 OLEYL ETHER, OLEYL ALCOHOL, ALCOHOL DENAT., AMMONIUM HYDROXIDE, POLYGLYCERYL-2 OLEYL ETHER, OLEIC ACID, SODIUM DIETHYLAMINOPROPYL COCOASPARTAMIDE, 2,4-DIAMINOPHENOXYETHANOL HCl, m-AMINOPHENOL, SODIUM METABISULFITE, HYDROXYPROPYL BIS(N-HYDROXYETHYL-P-PHENYLENEDIAMINE) HCL, EUGENOL, THIOGLYCERIN, TOLUENE-2,5-DIAMINE, AMMONIUM ACETATE, LINALOOL, ALPHA-ISOMETHYL IONONE, RESORCINOL, EDTA, CITRONELLOL, ERYTHORBIC ACID, PARFUM / FRAGRANCE. AQUA / WATER, CETEARYL ALCOHOL, GLYCERIN, BEHENTRIMONIUM CHLORIDE, CANDELILLA CERA / CANDELILLA WAX, AMODIMETHICONE, CETYL ESTERS, ISOPROPYL ALCOHOL, PARFUM / FRAGRANCE, SODIUM PCA, TRIDECETH-6, TOCOPHERYL ACETATE, ETHYLHEXYL METHOXYCINNAMATE, LINALOOL, HEXYL CINNAMAL, CHLORHEXIDINE DIHYDROCHLORIDE, CETRIMONIUM CHLORIDE, BENZYL ALCOHOL, LIMONENE, CAMELINA SATIVA SEED OIL, AMYL CINNAMAL, GERANIOL, BHT. AQUA /WATER, HYDROGEN PEROXIDE, CETEARYL ALCOHOL, SODIUM SALICYLATE, TRIDECETH-2 CARBOXAMIDE MEA, PHOSPHORIC ACID, CETEARETH-25, TETRASODIUM ETIDRONATE, AQUA / WATER, CETEARYL ALCOHOL, BEHENTRIMONIUM CHLORIDE, AMODIMETHICONE, CETYL ALCOHOL, C12-15 ALKYL BENZOATE, GUAR HYDROXYPROPYLTRIMONIUM CHLORIDE, SODIUM HYDROXIDE, HYDROXYETHYLCELLULOSE, HYDROXYANTHRAQUINONEAMINOPROPYL METHYL MORPHOLINIUM METHOSULFATE, TRIDECETH-6, CHLORHEXIDINE DIGLUCONATE, FUMARIC ACID, ISOPROPYL ALCOHOL, CITRIC ACID, CETRIMONIUM CHLORIDE, PARFUM / FRAGRANCE. TETRASODIUM PYROPHOSPHATE, GLYCERIN. (F.I.L. C201759/1). (F.I.L. C202318/2). (F.I.L. D218520/1). (F.I.L. C217502/1). "

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