I actually found the vaping safety area and saw the nickel thread. Some good stuff. I guess I shouldn't be really concerned. I didn't realize my gf had a nickel allergy and she didn't die or have her throat swell up from using mine. She just said it taste bad. Must be very little nickel being let off.
Hey bud, welcome the VU
In regards to using pure nickel wire I don't see how it could be any more or less dangerous than using one of those "special wires" like gplat or another wire where we honestly don't know what blend of metals or amounts in the mix we use. As for the Standard resistance wires we use, one is NiChrome which is literally composed of two elements, Chromium and Nickel (some versions of Nicrome can have small amounts of Iron in them as well but mainly just the two elements compose it hints the name being a hybrid of the two elements.)
The other main resistance wire, Kanthal, is a blend of Iron, Chromium, and Aluminum.....with Aluminum supposedly linked in some instances to affecting memory and iron fumes being toxic at melting point, or any heavy metal fumes for that matter, if am forced to come to the conclusion that vaping nickel wire is no worse than using stock resistance wire.
As other's have stated, we don't have the long long term vaping studies, they're still being done, to prove what the truest long term effects of vaping will be, just that we all are in agreement that it is safer than smoking...it literally saved my life (I've written my story in other threads, you can find it if you wish to find how vaping literally saved my life,) and I breathed so much better within a few short months of switching from what felt like a hopeless smoking habit that I was at the mercy of for life...i had quit quitting and had given up convinced I'd never be able to stop smoking and vaping saved me from that as well as I am almost nic free from where I started and the strongest possible nic levels a couple years ago....and vaping gear has excelled and improved by light years since then making it safer and better all the time.
Nickel wire has been used in vaping coils for years, just not as the contact metal vaporizing the liquid. Pretty much all stock Kanger coils from the T2 on (I never tore apart anything older than that,) used Nickel as leads tack welded to a nicrome coil to help keep the insulator for the bottom of the coil assembly from burning up and shorting the coil out as well as many older RTA atty's required NR-R-NR configured coils that used Nickel or pure silver wire even as leads to a resistance wire coil. Most of these RTA's were designed with a ceramic cup style coil holder and the nickel leads helped keep things from heating things up in the wrong place making the builds lasting longer and coils working more efficiently. Examples of these style tanks are the Oddysseus Tank and Diver V1 and V2.
So, in some small part or another, Nickel wire has been used in vaping for years and nothing until temp limiting came into the picture questioned nickel's probable toxicity as it is now what is vaporizing the liquid instead of just being a non resistance lead for electricity to pass threw to the resistance wire for a more efficient coil. Hope this helps put your mind further at ease and I wish you happy vaping and any more questions please don't hesitate to ask...there are no stupid questions, only stupid reasons for not asking them. But as someone vaping for years I am sure you have some advanced knowledge and I could probably learn a thing or two from you
Cheers