Background
I smoked unfiltered pipes for many years and accumulated a nice collection of pipes. Tongue bite has always been an issue with which I struggled. Eventually, I researched the topic and decided to switch to 9mm charcoal filtered pipes.
I now smoke filtered pipes exclusively. I can smoke almost any tobacco in any filtered pipe with zero tongue bite.
But what of my collection of unfiltered pipes? Are they no longer of any utility to me?
I experimented filling the bottom of their bowls with silica crystals, but that did not stop tongue bite.
Then I hit upon an idea.
The Experiments
Fill the bottom third of the bowls with charcoal pieces (see photos)
Constants
Pipes
several quality unfiltered briars -- medium size bowls -- well broken-in
Tobacco
Carter Hall -- a typical American codger blend -- mostly burley with a little virginia and a little flavoring -- I let it dry out a bit, but not to crumbling -- I pack it medium (not too loose, not too tight)
Smoking Technique
I smoke slow (pipe does not get hot on the outside) -- I smoke it down to ash -- I sip water now and then
Result
No tongue bite!
Conclusion
I can now enjoy smoking my old unfiltered pipes, albeit only the top two thirds of the bowl.
Notes:
1. If I smoke Carter Hall in an unfiltered pipe without charcoal, I get tongue bite and require about two days to heal.
2. I still prefer to smoke filtered pipes, all things considered. Filtering is better, and I can enjoy a full pipe.
3. After packing the bowl, I give it a few hard draws, as I usually do. Little bits of charcoal (as opposed to little bits of tobacco) must then be rinsed from my mouth before lighting.
4. Smoking down to ash is no problem. There are no issues with burning charcoal instead of tobacco.
5. I detect no charcoal in the smoke flavor or scent.
6. The draw is particularly good because of the air space under the tobacco.
7. I find a third of a bowl to be the minimum required charcoal.
I will be happy to answer any questions and entertain any suggestions. I hope some may find this information useful.
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