|Rosa centifolia photo from Aromatics International - where they sell the hydrosol of this rose|
I asked three experts to help me, and they quickly came to the rescue:
Andrea Butje of Aromahead is one of those experts who is humble enough to say when something is outside of her area of knowledge:
Nice to hear from you! I *imagine* that it is because the flower petals are too delicate to withstand the heat of a distillation. That may be why it is produced only as an absolute. Must be the damascena flowers are stronger. But not being a distiller or expert on distilling roses, I can not be totally sue. Maybe ask a rose distiller? How about Alain at Florihana. He is amazing.
So I asked Alain of Florihana and he offered this expert information: