Flash point, laser fuser and lubrication

I've been on the "Fire Warden" course at a local station precisely once, so I'm afraid that I have to disagree with you slightly. The contents of the extiguisher are entirely immaterial. The extinguisher is just there to act as a propellant so that you can amuse yourself pushing burning cardboard boxes and/or burning wastebins around while awaiting the professionals. They bring huge hoses so they can make the burning stuff really fly :-) And the powder ones are allegedly good for annoying the neighbours and rendering anything in the room utterly useless in the future. I say "allegedly" as the instructor would not set it off in the courtyard outside as it would annoy the locals (about 50m away) who had their washing out. It's a pity that page about lighting a barbie with LOX has been taken down ... Antonio -- --------------- Antonio Carlini arcarlini(a)iee.org