METHOD FOR COLORING HAIR WITH PRETREATMENT
Patent Information
- Application Number
- DE602017095962
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2016-04-25
- Filing Date
- 2017-04-25
- Publication Date
- 2026-07-15
- Estimated Expiration
- 2037-04-25
AI Technical Summary
Existing hair coloring methods, both permanent and temporary, face challenges such as hair damage, scalp irritation, difficulty in achieving desired color intensity and stability, and poor washfastness, especially with oxidative and direct dyes, and require multiple application cycles for intense coloration.
A method involving a pretreatment with a primer composition to modify the hair surface, followed by a multilayer application of cationic and anionic polymers to enhance adherence and evenness, reducing the number of application cycles and improving washfastness and color stability.
The method provides enhanced color intensity, evenness, and stability with improved washfastness, while being user-friendly and avoiding scalp coloring, using odorless compositions that do not damage hair.