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研究表明，烟叶欠熟、变黄后期和定色前期时间太短是造成 Ｃ Ｂ１（翠碧一号）光滑（僵硬）烟产生的直接原因。淀粉未充分转化造成含量过高是内在本质。光滑（僵硬）烟的产生还与品种特性、部位、装烟密度、施肥有关。提高采收成熟度、延长４０～４５℃烘烤时间可显著降低光滑烟比例。
Studies have shown that tobacco is undermature, late yellowing and pre-fixing time is too short is the direct cause of the smooth (rigid) C B 1 (Cui Bi) smoke generated. Inadequate conversion of starch caused by excessive content is the intrinsic essence. The smooth (stiff) smoke is also related to the variety traits, location, density of tobacco, and fertilization. Improve the maturity of harvest, extend the baking time of 40 ~ 45 ℃ can significantly reduce the proportion of smooth smoke.