near IR filter material

ses

Anything metal will work. It's not a paint but the electrical tape I have blocks IR (at least out to 1 um.) The roll I have "Scotch super

George Herold

Try black paint. If it's black in the visible, chances are high that it's black in IR.

Metallic paint may be a good one to try, too.

RHRRC asked

And crucially

How about the metallic sprays used to shield plastic enclosures, like nickel spray:

My additional question, Anything transparent to visible light, but opaque to IR?

...Jim Thompson

Get a roll of aluminum foil adhesive tape used for sealing heating and air-conditioning ducts. It is cheap, and sticks to just about anything.

RFI-EMI-GUY wrote in news:4a0f7951$0$21099$ snipped-for-privacy@unlimited.newshosting.com:

I would think that plain old black paint would be opaque to IR.

Depends on what it is made black with. If it is made black by "carbon black" or "lampblack" or the like, even most other black true pigments, then it should also be black to IR.

The problem is if it is made black by a dye. Dyes mostly pass IR.

- Don Klipstein ( snipped-for-privacy@misty.com)

Now you are just guessing. I have already had a couple of bad surprises on that one.

for IR block, Carbon based black paints like Krylon flat black. Metallic dust based paints or foil tape. Anything else is just a guess.

As for block It transmit visible, the only thing that comes to mind is the filters for color CCD cameras or other dichroic optics, Edmund Industrial Optics sells low cut filters for the purpose.

Steve