HIE has alot of visual response. With no filter or a red filter it looks in a VERY general sense like common b/w film. (I can't compare to anything specific).
confirms response up to about 900 nm.
I just figured it was a waste to use it for other than its unique properties like Wood Effect.
I had read somewhere that some effect is visible if items are 'illuminated' with a pair of clothes irons (no steam!) at close range, but that just sound like too much nuisance to me, as well as fire hazard. (No tripod mount on the irons :O) )