On Wed, 15 Jul 2015 17:40:21 +1000, Jon Anderson
wrote:

I was just looking at some of my IR photos, and realized asphalt comes
up dead black, near zero reflectance. Maybe give a clue to materials
that absorb. Suspect maybe rubber might absorb too. Maybe a patch of
innertube stapled to the underside of the counter?

Jon
If I can't find some paper or fabric to work I do have some rubber
sheet I copuld try. Thanks.