If it is a standardized extract, there may not be enough waxes and plant fats in it to make a very workable tincture. However, non-standardized 20X SD resin has been used to make SD tinctures before. If one has some SD leaf as well as the 20X extract, one may well be able to mix a few grams of the leaf with the 20X SD to make a better tincture that contains a fair amount to the resins(plant waxes and oils) that help the salvinorin A diffuse through the mucus membranes of the mouth.
Either way, let the SD set in the ethyl alcohol for a few days be fore straining it. The salvinorin A saturation point tends to be that amount in 1g of SD leaf, or equivalent extract # of Xs, per ml of ethyl alcohol. In this case 20ml of ethyl alcohol per 1g of 20X SD.
