from Kobashi introduction:
There are three main grades of Ylang Ylang, graded depending on the length of the distillation process. The first is called extra, then three more distillations called grades 1, 2, 3 and complete. Kobashi Ylang Extra is the first part of the distillation. The charged still is run constantly; in the beginning Extra and one are taken, then two and then three. Complete is a mix of the total distillation. Flowers have to be collected every day in the morning some are riper than others.
There are three main grades of Ylang Ylang, graded depending on the length of the distillation process. The first is called extra, then three more distillations called grades 1, 2, 3 and complete. Kobashi Ylang Extra is the first part of the distillation. The charged still is run constantly; in the beginning Extra and one are taken, then two and then three. Complete is a mix of the total distillation. Flowers have to be collected every day in the morning some are riper than others.