Sunshine-cured tobacco, Bastam, Iran Curing and subsequent ageing enable with the sluggish oxidation and degradation of carotenoids in tobacco leaf. This provides specified compounds during the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic taste that contributes to your "smoothness" from the smoke. The https://broadfar.com/heated-tobacco-shaping-a-safer-sustainable-smoking-future/