In Liming for parchment or leather processing, the hides are soaked in an alkali solution by a drum/paddle or pit-based operation where five main objectives are met. The objectives are:

• Removal of interfibrillary proteins.
• Removal of Keratin proteins.
• Collagen swelling due to the alkaline pH.
• Collagen fibre bundle splitting.
• Removal of natural grease and fats