Blow torches come in many variations. One of the most common types is a simple hand-held propane torch. A host of professionals use blow torches for a wide range of purposes. Some blow torches have integrated lighting systems, but the simple ones require manual ignition.
Stand the torch upright in a clear area, devoid of combustible materials.
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Hold the lighter or sparker in front of the torch's nozzle and activate it. The sparker activates when you squeeze the handle, which rubs flint against a striker, thereby creating a spark. Repetitively squeeze the handle until the torch lights. You can simply ignite the lighter with the flame in front of the nozzle.
Turn the dial on the torch slowly until the propane ignites with the flame or sparker. Remove the lighter or sparker and place it away from the work area.
Adjust the flame by turning the dial until you have the size of flame you want.
Always keep combustible materials away from your torch to avoid accidentally igniting them.