Mix it in a dark glass bottle.
The general ratio is 10ML base oil +5 drops of essential oil.
Essential oil is recommended for use at night, grapefruit is sensitive to light, and must not be used during the day.
After blending, you can make massage oil and face oil.
Three drops of essential oil can be applied to 1 face, and 10 drop of essential oil can be used for facial massage.
Don't apply too much, the skin can't absorb it. Wipe off the excess oil with a paper towel, which is a bit wasteful.