TANNING AGENT, PREPARATION OF LEATHER FROM UNHAIRED MATERIAL, AND PICKLING, TANNING OR POST-TANNING METHOD

摘要

Tanning agents containing an omega , omega -dialdehyde as as the active tanning substance, optionally in a deactivated form, in combination with a polymer containing hydroxyl groups, and methods for using such tanning agents in the preparation of leather, particularly in pickling, tanning, and retanning.