Sunlight-cured tobacco, Bastam, Iran Curing and subsequent growing old allow to the sluggish oxidation and degradation of carotenoids in tobacco leaf. This creates specific compounds within the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes towards the "smoothness" of the smoke. https://nusoheatedtobacco24353.wikiitemization.com/4943609/smoke_for_dummies