A system and method for dyeing and/or lightening keratin-containing fibers, as well as a lightening composition for use in such a system and method are described, which are able to provide a high levels of lift while avoiding irritation and/or soothing the scalp. The system and method include a first composition, which may be a lightening composition. That composition includes (i) at least two alkali components for lightening keratin-containing fibers, wherein one of the at least two alkali components comprises sodium metasilicate and/or a metasilicate salt, and the composition comprises about 0.1 to about 10 weight percent of the at least two alkali components； and (ii) an arginine compound, wherein the arginine compound is present in an amount that would be effective to reduce irritation to a surface of a mammal having keratin-containing fibers. The system and method also include an oxidizing agent composition comprising an oxidizing agent, wherein the system has a pH of at least about 9 to about 12. The lightening composition may be used independently in different hair coloring systems or as part of the system and method noted above and/or incorporated in a kit for lightening and/or coloring keratin fibers.L'invention concerne un système, un procédé et un kit de coloration et/ou d'éclaircissement de fibres contenant de la kératine qui permettent d'obtenir des niveaux de volume élevés tout en évitant l'irritation et/ou en apaisant le cuir chevelu. L'invention comprend une composition d'éclaircissement comprenant (i) au moins deux composants alcalins pour éclaircir des fibres contenant de la kératine, l'un des au moins deux composants alcalins comprenant du métasilicate de sodium et/ou un sel métasilicate, et la composition comprend d'environ 0,1 à environ 10 pour cent en poids des au moins deux composants alcalins ； et (ii) un composé arginine, le composé arginine étant présent en une quantité efficace pour réduire l'irritation sur une surface d'un mammifère dotée
