I made my first attempt at scent mixing. It actually is really a beta version, as it is not very scientifically drawn together.
There are two critical numbers for scents – the concentration at which they are noticeable, and their vapor pressure at STP. Some long-acting scents havea low vapor pressure but a low olfactory threshold; they “last forever,” like calone.
Others with a high vapor pressure and high olfactory threshold come and go; these are the “head notes.” I’d tried yarrow, which has a definitely short time period.
My blend was a bit rich on benzoin (the tincture). I was afraid it would suffocate the mixture, but it was nice.
Rain starts out with freshness and flowers and earthy scent, and fades to a twilight smoky campfire after some hours. I like it.