How much essential oil I can get from my raw material

For the first factor, the bigger the column is, the better for you. For those raw materials which are extracted with water distillation, the size of the boiler is determinant. These are clove buds, coffee beans etc (see the chart below).  Since the oil content is calculated for the weight of the raw material, it is the volume of e.g. 1 kg of the particular raw material that defines how much of that you will be able to put into the column. E.g. 1 kg of eucalyptus dry leaves take 3 to 4 times more space then 1 kg of...