[EN] HAIR COLOURING METHOD, COMPRISING REACTION OF A CAPPED DIAZONIUM COMPOUND WITH THE HAIR, AND RESPECTIVE COMPOSITIONS AND COMPOUNDS [FR] METHODE DE COLORATION DE MATIERE POREUSE
[EN] HAIR COLOURING METHOD, COMPRISING REACTION OF A CAPPED DIAZONIUM COMPOUND WITH THE HAIR, AND RESPECTIVE COMPOSITIONS AND COMPOUNDS<br/>[FR] METHODE DE COLORATION DE MATIERE POREUSE