[krschultz]

Note that this article (at least from the translated version) seems to be implying that the risk is around burning or particulate carbon fiber. I would definitely believe that.

The epoxy is also pretty nasty too. If you don't wear the right personal protective equipment when using it, you can quickly become sensitized to it. I don't know what that means medically, but it can't be good. I have always worn the right gear when building things, but it is clearly harmful to you without proper ventilation and separation from your skin.

I love composites, but they definitely have downsides.

[aluhut]

I can confirm this. They say that the dust becomes dangerous above 650°C. The fibers become even smaller and reach the lungs.

[chrisBob]

Epoxy resin is an algerin which is why you get sensitized to it. You have to be very careful when it is not fully cured, but once cured it is a good plastic. having said that I don't recommend getting exposed to any plastic smoke.