On a oxy-propane torch, it works a bit differently than on a hot head. Hot Head torches run a bit to the reduction side anyway, so it is fairly easy to get a reduction flame on them.
Start with a neutral flame. Candles about the diameter of a glass rod (5-6 mm), with a slight white or yellow tip.
To get an oxidizing flame, turn your oxygen UP. You should hear a slight hiss, the flame will get slightly smaller and sharper, and the candles should turn all blue.
To get a reduction flame, turn your oxygen DOWN, but not off. Most torches these days rely on the flow of oxygen to keep the internal tubing and face cool. The candles should lengthen and turn at least half yellow, and the flame will get soft and somewhat bushy.
Hope this helps!
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Chaotic Glass: Safety for the glassworker, and random thoughts and opinions on the state of the glassworking world
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reduction & oxidising ?
