The processing of brightleaf and burley tobaccos for tobacco leaf "strips" produces several byproducts such as leaf stems, tobacco dust, and tobacco leaf pieces ("small laminate").[33] To improve the economics of producing cigarettes, these byproducts are processed separately into forms where they can then be added back into the cigarette https://www.vapeciga.sk/elektronicke-cigarety-bez-nikotinu-vape