Sunlight-cured tobacco, Bastam, Iran Curing and subsequent ageing let for the slow oxidation and degradation of carotenoids in tobacco leaf. This creates particular compounds while in the tobacco leaves and offers a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes to the "smoothness" in the smoke. https://andywtldt.salesmanwiki.com/9505885/the_ultimate_guide_to_tabacco