I'd be cautious with the colors you are using.
Are some arsenic or cadmium or lead or .....
I had a good friend who used to much cobalt blue
and without a mask. Was tough on his lungs...

Glass is safer.

Stainless steel will give off bad fumes.

Martin

On 3/3/2015 8:18 AM, Diane wrote:
replying to Jim Wilkins , Diane wrote:
muratlanne wrote:

"Diane" wrote in
message roups.com...
Pure aluminum melts at 660C, alloys have lower melting points.
http://www.calphalon.com/Pages/Simply-Ceramic.aspx -jsw


Thanks, I will just do some tests in with some glass firings, I don't
quite understand what the other posts are talking about but as an artist I
tend to just try things out, I just wondered if there were any fumes or
gases given off that could cause problems. I have done some enamelling
onto steel and it worked fine .