Leather is a renewable resource, so it allows us to create valuable products out of what otherwise would be waste. The largest sources of cattle hides are the beef herds of North and South America. Can be easily attacked by bacteria and rot. Are dirty with blood, dung, etc., sticking to it and contain hair and other materials which are not needed. For making into upholstery, the leather should be Dry and flexible Stable Should have color, softness and other properties for the specific use.
Tannery operations achieve the above changes.
Tanning makes the leather fiber resistant to bacterial attack. Nowadays, chrome tanning is the most popular method. Modification of the properties as needed in the final leather. Finishing on the surface. The first job in the tannery is to give the hides a good wash, with water, some special detergents and some other chemicals.