Tobacco packed in bales is so brittle that without proper humidification, it would crumble into dust when processed further. A vacuum pump extracts the air from the bales and replaces it with steam, sometimes supplemented with aromatic substances.
Tobacco packed in bales is so brittle that without proper humidification, it would crumble into dust when processed further. A vacuum pump extracts the air from the bales and replaces it with steam, sometimes supplemented with aromatic substances.