A fire blanket is designed to smother a fire by cutting off
its oxygen supply. With no oxygen to feed it, the flames will
die. Fire blankets were once used to smother fire on humans, but
not so much any more.
A fire blanket is now more appropriate for smothering equipment
fires, such as computers. A fire extinguisher would completely
trash a computer if used. A fire blanket might salvage some computer
parts.
A fire blanket is also a good emergency tool to have in the kitchen
for smothering grease fires or any other cooking-related fire
that might break out in the kitchen. When using a fire blanket,
it is important to protect your hands; fold the blanket first
around the hands before applying it to the heat and the fire.
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