On 29 Sep 97 at 16:37, N STEENKAMP [M.ING E&E] wrote: > If I'm not mistaken, then UV (with high enough frequency) causes the > formation of ozone. That is probably what causes the 'fresh smell'. > Now, before we all switch on our UV erasers in an effort to save the > ozone layer, I've also heard that ozone is poisonous. I'm not sure > about that though, but in the least, it irritates your airways. I > once forgot my homebrew UV eraser on overnight and felt really bad > the next day. Since then I have constructed a small timer (with a > PIC of course!) to prevent such incidents in the future. > It's a fairly aggressive oxidant, I would'nt recommend breathing it instead off normal oxygen (ozone is 3 atoms of oxygen, 'normal' oxygen 2) MikeS (remove the you know what before replying)