Erwin Weinrich

Tetraaminopyrimidines as developers in oxidation hair dyes - esp. used with meta aminophenol couplers for blue shading dyes

Oxidation hair dyes based upon tetraaminopyrimidine developers

Agents for reducing the damage to hair during bleaching and dyeing

Hair dye compositions containing 3,5-diamino-2-substituted-alkylbenzenes

Oxidation hair dyes based upon tetraaminopyrimidine developers and mono- and dialkyl -m- dihydroxy benzene couplers

Two-component peroxide hair bleaching compositions

Oxidation hair dyes based upon tetraaminopyrimidine developers and couplers therefor

Developer-coupler hair dyes based on triamino-pyrimidinones

PROCESS FOR RETARDING THE HARDENING OF EPOXIDE RESINS USING A BARBITURIC RETARDER AND RETARDING COMPOSITIONS

Oxidation dye-based hair dyeing compsns. - contg. aromatic- or heterocyclic-substd. omega-cyanoacetyl deriv. couplers and developers