Curing

• Curing is the most important operation in the production of tobacco. It is done to impart the required color, texture and aroma to the final product.
• Curing involves the process of drying, complete decomposition of chlorophyll, changes in the nitrogenous compounds including the release of ammonia, hydrolysis of starch into sugars and respiration or fermentation of sugars.
• The grained texture in cured tobacco leaves is the result of crystallization of the mineral salts.
• The leaves loose more than 85% of their weight as a result of both dehydration and respiration.
• The curing process allows the carotenoids in the leaves to oxidize and degrade producing a smoother and aromatic flavor.
• After curing the leaves are allowed to regain moisture of 24-32% of the total weight. Increasing this moisture makes the leaves more pliable and reduces damage during handling.
• Curing depends on the cultivation practices, ease, marketing value and the economic condition. Generally, there are four methods of curing, viz; Flue, Air, Sun and Fire curing.