Quote Originally Posted by Lostmason View Post
NP,but quick question,just how do they straighten out on their own?
Hi Matthew,

Heat and manufacturing process.

Molded vulcanite stems have had about three ‘periods’ of manufacturing changes and the first two didn’t heat the vulc as hot so it has a greater tendency to revert to it’s original form. Almost all current molded stems are made with air injection (like soft serve) at higher temps so they don’t have much ‘memory’ and they don’t readily (but can) revert. They’re also lighter in weight, more maleable but not as strong and dense.

Rod vulcanite is a different manufacturing process and I don’t know that I’ve ever seen one revert.