drygol said:
Pretty much with one difference, not when it cools down but when it crystalises/changes state - it may be cold at that moment
Hello everyone. I'm sorry to revive this 3-months old thread, but I just found it while scouring the web...
I was searching for infos on the sulfur sticks because I wanted to try them for some (involuntary) muscular contraptions I'm feeling on my arm. Fact is that I'm now far from my home town and I wanted to check how widespread they were and, maybe, how they worked. I am from a small town in Liguria, Italy, and reading here it seems they are far less spread than I thought :).
My father regularly uses them since at times he experiences several degrees of back pain, and for the mild ones he always told they were miraculous. We always bought them at the local drug store and, thinking back now, they always looked quite "local", often sold loose, wrapped in paper and without any branding. It's just recently that my father bought a bigger box of them and inside there was this leaflet explaining some of the things you already mentioned (they are supposed to work absorbing static charges from muscles) and how to keep them cooled to prolong their life or to wash them under running water after use to let them last longer.
I never used them myself (on my body, I mean), however I can confirm the crackling sound they produce. It is absolutely not due to any kind of mechanical stress: just holding/rolling them in your bare hands will produce a lot of crackling that will gradually fade as they absorb charge from your hand (assuming this is how they work). Then I remember rolling them on my father's back and in some points they would crackle more and less in others. Sometimes I also remember the stick suddenly breaking in half after a stronger crackle. Either way, the stick would stop crackling after some time (one use, maybe two) and then they had to be replaced.
All of this just confirms drygol's theory on the supposed amorphous/crystalline state change of the sulfur. The sticks also always looked "extruded" (from the traces on their surface) which may be a suitable high-temperature production method for the amorphous sulfur. Another thing I remember is that the sticks were not 100% pure but contained some small amount of "black grains" (probably impurities). They also looked bigger than the ones I've seen online (http://www.youtube.com/watch?v=p32wdZrs2Vo), about 1.5 inches thick.
This is all I remember about them and I hope you may find them useful if you manage to find a place where to buy them. And I'm sure I will try them as well, since I may be starting to feel the aging ;).
Some interesting links follow:
- 2006 US patent application: http://www.google.com/patents/about?id=J1ynAAAAEBAJ&dq=11/458686 (Prior art anyone?!? ;))
- Confirming the Italian origins: http://saludbio.com/en/azufreterapia-sticks-sulfur
- Is "pain snappers" the proper name? http://www.herbsandsuch.net/
- FAQ about them: http://www.herbsandsuch.net/page/1236875 (I am now noticing this is the same guy which filed for the patent... And he is claiming for the actual invention... How lame is that... You may need to pay him royalties in the US if he is granted the patent, some US citizen should write to USPTO...)
- Italian Wikipedia entry, this is the real deal: http://it.wikipedia.org/wiki/Candelotto_di_zolfo
While searching, I noticed that someone is trying to sell these things as a relief for any pain. IMHO they just help with muscular pain.
Cheers.
Danilo