Sunshine-cured tobacco, Bastam, Iran Curing and subsequent growing older permit for that slow oxidation and degradation of carotenoids in tobacco leaf. This produces specific compounds during the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes into the "smoothness" on the smoke. https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/