LAGRANGE et al v. KONRAD et al - Page 82


                     Patent Interference No. 103,548                                                                                             

                     17. A method according to claim 9, wherein composition (A) is applied to the                                                
                     keratinous fibres and composition (B), containing a metal salt comprising a                                                 
                     manganese, cobalt, iron, copper or silver salt, is applied before or after the                                              
                     composition (A).                                                                                                            
                                                                                                                                                
                     18. A method according to claim 17, wherein the metal salt is used in a                                                     
                     proportion of between 0.01 and 2% by weight, expressed as metal ions, relative                                              
                     to the total weight of the composition. Corresponds to Count 3.                                                             
                                                                                                                                                
                     19. A method according to claim 9, wherein composition (A) is applied and,                                                  
                     before or after this composition, composition (B) containing a rare-earth salt                                              
                     selected from the group consisting of a cerium, lanthanum, europium,                                                        
                     gadolinium, ytterbium and dysprosium salt is applied.                                                                       
                                                                                                                                                
                     20. A method according to claim 19, wherein a the rare-earth salt is present in a                                           
                     proportion of between 0.1 and 8% by weight relative to the total weight of the                                              
                     composition.                                                                                                                
                                                                                                                                                
                     21. A method according to claim 9, wherein a composition based on hydrogen                                                  
                     peroxide is used as the oxidizing medium, the hydrogen peroxide content in the                                              
                     composition being between 1 and 40 volumes.                                                                                 
                                                                                                                                                
                     22. A multicomponent agent for dyeing keratinous fibres, in particular human                                                
                     keratinous fibres, comprising a first component consisting of a composition (A)                                             
                     containing a 5,6-dihydroxyindoline corresponding to formula (I):                                                            

                                                       HO                                                                                        
                                                                                         CH2                                                     
                                                                                           CH2            (I)                                    
                                                        HO                      N                                                               
                                                                                 R                                                               
                     in which R represents a hydrogen atom or a C1-C4 alkyl group, or an acid                                                    
                     addition salt thereof, and a second component consisting of a composition (B)                                               
                     which contains, in a medium appropriate for dyeing, either:                                                                 
                     (a) hydrogen peroxide at a pH of between 2 and 12 when the composition                                                      
                     (A) contains iodide ions, or                                                                                                
                     (b) iodide ions at a pH of between 3 and 11, when the composition (A)                                                       
                     contains hydrogen peroxide.                                                                                                 
                                                                                                                                                







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