I've been following this thread for a couple of days now and I've really enjoyed it

. Kudos to you Imeo for sharing your concerns and for doing something about it.
I sometimes use SS mesh in Genisis attys. Not too long after I started using this stuff I learned about the dangers of hexavalant chromium. I'm no chemist, but from what I gather that can be produced in small quantities by heating the SS up to red hot and it takes only a
very small quantity inhaled to be quite bad for us. That's one reason I stopped torching my wicks and the only reason I am so careful to not overheat the mesh when I pulse out shorts. It is also the reason I figured out a way to take out the wick before dry burning the coil. I then wash the unrolled wick in water, roll it back up again and slide it back in. The process works quite well for me.
I also found the data Borescoped included in post #193. The slightly different wording there and some more reading I've done on aluminum and titanium oxides makes me think titanium oxide is a bit safer in that you would have to inhale more TiO3 to harm you. OTOH, from what I've read about exposure levels that may have caused harm to people in the past, these oxides are a minor concern compared to hexavalant chromium.
Now I have no idea if hexavalant chromium is produced by heating Kanthal red hot, but I believe it can be produced by overheating SS and that leads me to think it can also be produced by overheating Kanthal. I believe safe exposure levels of hexavalant chromium are at least several orders of magnitude less than the oxides in question here and the health consequences are more serious.
I don't know if hexavalant chromium can actually even pass through the oxide layers on these materials. So basically I don't know anything for sure and I know how much the 'devil is in the details', just wanted to toss in my thoughts. If anyone knows more about this stuff and can help educate me,
please post (or PM me)
In the meantime, titanium wire sounds like a nice alternative to Kanthal to explore. I see no negatives so far and there may well be a few good positives to it. Works for me
Someone said in a previous post they thought we had a chemist (or something like that) on ECF. The Name 'Kurt' just came to mind.