Process for improving the light-fastness of leather dyeings

US4818246A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Alois Puntener · Rheinfelden, CH
• Gerhard Back · Lörrach, DE
• Josef Koller · Erkrath, DE

Key dates

• Filing date: Sep 17, 1987
• Grant date: Apr 4, 1989
• Expiry date: Sep 17, 2007

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P3/32
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

For improving the light-fastness of leather dyed with anionic dyes, the leather is treated, before, during or after dyeing, with a compound of copper.