Solid Brass

A solid brass act as a Faraday cage good paper?
Given that the top is also covered by some form Brass? I wonder how to make a cheap Faraday cage in case one of these pulses EMP decide saturate my neighborhood, because nuclear war. Also, as an addition can only be a simple cookie jar (the kind with the clowns and unicorns that) work?
Only if there is a principle to carry out.
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