When this evaporates to the point that the leaf is just moist and no liquid remains, add a few tablespoons of acetone to the leaf and use the leaf to wipe off the resin which will have crusted to the side of your dish. As this is evaporating be sure to stir it often to prevent more resin from collecting in any certain area. When this is dry, you will be finished. Our own assays of this extract process shows that it produces basically the same potency as standardized extracts of similar strengths, but it should be remembered that, unlike standardized extracts, the quality and potency of the end product is proportional to the quality and potency of the starting material. I would like here to strongly discourage against giving extracts stronger than 5x to people who are inexperienced with salvia.
Many people find the salvia experience quite disturbing and unpleasant.
It is far better to give a person a weaker extract than to have to physically restrain them or piece them back together psychologically. Salvia also seems to have rather variable effects between people, some people being very susceptable and some not. So it is better to give a small amount at first in order to see how strongly it affects a person. I, for example, am quite content to take two hits of 5x, while my wife must take 5-6 in order to obtain the same effects. Just try to remember that if you are giving this to someone else, they are someone else.