Quote Originally Posted by Flameon
The beauty of the double boiler method is you cant 'overcook' the weed (the boiling point of water prevents you getting over 100 C), however, it also means it is possible to 'under' cook it (as some people have experienced).

You need the temperature to be as close to boiling as you can consistently keep it (it also requires a bit more work, you need to watch it, regulate the flame up and down, and make sure it doesn't boil dry), otherwise the THC won't dissolve into the oli/ghee.

Its a technique that some people have struggled with, but as long as you're aware of the 'do's and don't's, you should be rocking and rolling.
Flameon-
excellent point i failed to consider regarding temp required and water boiling/evap points.

my solution would then be to use vegetable oil in the boiler.

the smoke points of various cooking oils are much higher than required for this project.
just be careful no to burn yourself:thumbsup:

Smoke Points
Safflower 265 degrees C
Sunflower 246 degrees C
Soybean 241 degrees C
Canola 238 degrees C
Corn 236 degrees C
Peanut 231 degrees C
Sesame 215 degrees C
Olive 190 degrees C
Lards 183 to 205 degrees C

also consider it will take longer for oil to evaporate.
i believe this may be a winner.