The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 2012
Filed:
Dec. 03, 2010
Alexandra Hullmann, Egelsbach, DE;
Martin Uellner, Darmstadt, DE;
Frank Kufner, Darmstadt, DE;
Sabine Schafer, Rüsselsheim, DE;
Bernd Nocker, OberRamstadt, DE;
Alexandra Hullmann, Egelsbach, DE;
Martin Uellner, Darmstadt, DE;
Frank Kufner, Darmstadt, DE;
Sabine Schafer, Rüsselsheim, DE;
Bernd Nocker, OberRamstadt, DE;
Kao Germany GmbH, Darmstadt, DE;
Abstract
The present invention concerns a process for oxidative coloring keratin fibers especially human hair wherein a pretreatment is applied onto hair prior to application of oxidative coloring agent. Accordingly, present invention is a process for oxidative dyeing of keratin fibers especially human hair wherein an aqueous composition comprising at least one inorganic salt catalyzing and/or effecting the oxidative color development reaction from oxidative dye precursors is applied onto wet or dry hair and optionally rinsed off, and subsequently an aqueous composition comprising at least one oxidative dye precursor, optionally at least one coupling agent and at least one oxidizing agent is applied onto hair and after processing of 5 to 45 min with or without use of heat, preferably at a temperature range between 20 and 45° C., rinsed off from hair.