| http://www.w3.org/ns/prov#value | - In the second process step of the previously described process for bleaching hair, according to the invention, the hair is preferably irradiated by light of a light source selected from arc lamps, a deuterium lamp, a mercury discharge lamp or xenon lamp and lasers such as e.g. a semiconductor laser, a nitrogen laser or a helium-cadmium laser, but other light sources, e.g. the sun, are also suitabl
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