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| Dear My name is Bob: "My name is Bob" <[Only registered users see links. ]> wrote in message news:QVPhh.12212$[Only registered users see links. ].easynews.com... .... Tom Davidson is right. Black plastic film stops some light, but the spectrum is unaffected from far-IR thru RF, and x-ray and gamma pass right through it also. David A. Smith |
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| black , blocks , poly |
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