Posted 21 March 2005 - 05:09 PM
At the end of the day, it's all down to quality, or the effort you are prepaired to put in. If you want he best, you'll remove the bark, you will not use rotted wood, etc, hell you'll even soak the wood in alcohol to remove stuff, if you were on a quest for the fastest BP. I don't know the amount of difference bark makes, I do know that it is different though. In terms of percentages, the bark on willow can make upto around 10%, depending on the thickness of the sample. Would you use potassium nitrate or sulphur that was only 90% pure? If the bark produces more ash than the wood, as I think it does, you have reduced the advantage that willow gives. The bark can only produce inferior charcoal. If it produced better quality charcoal, there would be no bark left on willow trees, people would use the bark instead.