lignosulphonate powder tanning in leather

...Lignosulphonate is used in leather tanning HS COAD 3804000090 Calcium Lignosulphonate: Direct application of lignosulfonate to leather tanning is not effective. Chemically modified lignesulfonates with appropriate particle radius distribution and resulting in better soluble collagen reacting with functional group reactive groups can be used for leather tanning or retanning. The suitable modified sulfonate (re) tanning......