Sun-cured tobacco, Bastam, Iran Curing and subsequent aging allow for that slow oxidation and degradation of carotenoids in tobacco leaf. This produces selected compounds while in the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes on the "smoothness" of your smoke. https://bookmarksea.com/story19214008/an-unbiased-view-of-smoke