Sun-cured tobacco, Bastam, Iran Curing and subsequent aging allow for the slow oxidation and degradation of carotenoids in tobacco leaf. This produces sure compounds in the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes into the "smoothness" with the smoke. Smoke https://broadfar.com/heated-tobacco-shaping-a-safer-sustainable-smoking-future/