before the leather is dried in order to replace the natural oil that had been lost in beam
house and tan yard processes. Subsequent finishing operations are performed after
drying, such as buffing, embossing, and plating, which are done to make leather soft
and aesthetically appealing (Midha and Dey 2008). In the tanning industry
Fresh Hides
Soaking
Liming
Lime f leshing
Bating
Deliming
Pickling
Tanning
Fat liquoring
Finishing
Leather
Measure size & height
Trimming
To remove blood, salt and dirt
Removes lime & other alkalis
Swelling hides and removing hairs
Removing hair & f lesh by roller
Reduce swelling
Removes non leather protein materials
Water washing
Making pelts slippery
Treating bated pelts with salt solution
Addition of oil in leather before drying
Tanning hides in to leather using chrome salt
Tanning hides in to leather with tanning
Makes leather soft & aesthetically appealing
Fig. 16.1 Leather manufacturing process
16 Environmental Impact and Treatment of Tannery Waste
581
Précédent

- 589/700

Suivant