On Thu, May 2, 2013 at 12:47 PM, <pagnu...@htdconnect.com> wrote: My guess is that these are the hardest to remove from circulating air. > - probably it's better to keep them in a confined chamber when preparing a > colloid. I am not sure whether they penetrate skin. >
I suspect that another problem is with nickel, specifically. I had a watch with a nickel wristband at one point, and I gradually developed a severe and chronic rash. There was a welt on my wrist for several months after I stopped wearing the watch. So the nanopowder nickel particles could potentially cause a great deal of irritation in the lungs and a powerful immune response as a result. Eric
