Lignin based Re-tanning agent - An Improved Process for Making Retanned Leather with Dyeing Effect

Single step process for retanning and dyeing of leather material.

A Single step process for retanning and dyeing of leather material using black liquor without any chemical modification and providing a single step option for retanning-cum-dyeing of leather is provided. Here dyeing is achieved using natural material, which is non-hazardous in comparison to the conventional synthetic dyes.

• Elimination of use of toxic synthetic dyes
• Utilization of effluent sourced from paper pulp mills, wood pulp mills and sugarcane bagasse pulp mills as a source of black liquor for leather retanning.
• Bioresource utilization through non toxic approach.