I have not...yet, alot of people keep saying that dry burning is bad...I guess due to whatever oxides are released at higher temps so my first round was spaced and I may do some compressed but I dunno yet...
I saw that too. But there were also critics with metallurgical backgrounds that basically dismissed the concern of oxides being "toxic".
There were a few that referenced studies that showed oxides that vapers are likely to be exposed to are considered "Mild Irritants" to the lungs but in industrial settings where employees would be exposed to doses far exceeding what any vaper would ever be likely to reach.
Most oxides formed on typical wire such as Kanthal is mostly aluminum oxide which bonds to the metal and is highly unlikely to flake off since the oxide is harder than the base metal. what does come off is usually in flakes that are unlikely to end up in the lungs, and again isn't technically considered toxic, especially in the minute doses that we would be exposed to.
Titanium Oxide is for the most part benign, it is the main active ingredient in sunscreen, but when it oxidizes it forms a whitish powder on the surface of the metal that is easily brushed off. That could be inhaled deep into the lungs but again, according to the responses referencing published studies is still only a irritant if inhaled and not necessarily a toxin.
It's a judgement call concerning what metal you choose for your coil but I feel reassured that any exposure to these oxides from either Kanthal or Titanium is of such minimal risk that I'll experiment with Ti and feel confident that it's no riskier than any other available material.
The only issue I saw that does concern me is that contact
coils using Ti seem to be more at risk of shorting and popping than the others.
I love my contact micro-
coils but that doesn't mean I couldn't get used to spaced
coils if the performance and taste exceeds my long time friend Kanthal.