After the skin is tanned and kept for a period of time, subsequently they are placed into re-tanning, dyeing and fatliquoring. In general the objective of these processes is:
To improve the fullness and roundness of the leather
To improve the softness of the leather
To improve the grain-break of the leather
To improve the pasting properties for paste drying purposes
To improve the wettability of the grain, for improved adhesion of the finish
To improve the color of the leather into the desired level
To improve the flexibility of the leather by introducing fat into the leather
