11.03.06
Wella Patents Dye Agents
● Patent No. US 7,122,061 B2: A colorant for oxidative dyeing of keratin fibers, particularly human hair, based on a developer-coupler combination, has been patented by Wella AG, Darmstadt, Germany. ●
● Patent No. US 7,122,061 B2: A colorant for oxidative dyeing of keratin fibers, particularly human hair, based on a developer-coupler combination, has been patented by Wella AG, Darmstadt, Germany. ●