Re: Parvati/Snape
I see. I have instructions for most of the more common beauty potions, however the high end potions were usually proprietary and carefully guarded secrets, for obvious reasons. A new potion or potions could be developed, however a specific focus for the potion would be needed and it would take time and resources we may or may not have right now.
However, perfumes would be more easily done. Most magical perfumes have a common base potion. The rest is a combination of herbs, oils and other such things, along with spells, usually put together by skilled perfumers, however with the interest and time to experiment could do it.