I have had alot of tincturs that were good, the best is made of glycerin, taste like nuthing and is easy to consum, 1/2 a ounce or half a shot is enough to lay a elephant out. these are very hard to make becaseu of the time needed. I hear if you get a oz of bho or my fav, high quaility water extract and mix it with about 2 liters of glicerin then put it on a paint mixer for about 5 days it is great and almost all of the pure extract is absorbed into the 2 liters of glyserin, then you symply add more glycerin and more Pure extract to make more out of the hash that didnt absorb in to the mix. the result is a potent glycerin tht has no taste is absorbed into the body in minutes from the mouth alone and when consumed is just as quick, it is a very amazing thing getting blazed off of half a shot the feeling of cannabis coming over you like fraigt train messagging your brain and all the you can thinks is "shit this is awsome".

I also saw a video of HashBean making a glycerin tincture out of about 1 gram of bho and 8 oz of glycerin, worth a look for if you guys like the tinctures

I have also herd of tinctures that are so potent a small spray in the mouth under the tonge is all that is needed, and the effect is instant tanious, with in 20 seconds, I have yet to try this one out, but I have seen it.