Re: How many other manufacturers?
Really? The problem with acetylene is that it's prone to going bang in the absence of air unless dissolved in acetone, thus making an acetylene cylinder a potential double whammy - yet people use them all the time. The amount of pentane in a refrigerator is less than the amount of butane in one of those lighter refill cans. It is possible to get an explosion when pentane is mixed with air and ignited, see also methane, propane, butane and other stuff you can buy at garages or hardware stores. To what specific recent history are you referring?
Biting the hand that feeds IT
