IR-transparent and IR-non-transparent IR paints for industries

Transparent IR and non-transparent IR paints are a set of paints where the first one is visible to infrared readers (scanners) whereas the second one is invisible to them.

Both paints are black in the visible light but only IR-non-trasnparent is visible to IR scanners.

They are most often used as a set creating a solution hiding a barcode from the eyes of an average user. A barcode is applied with an IR-non-transparent paint (black in a visible light) on a prior applied IR-transparent paint (also black in a visible light).

That way, a barcode is invisible to the average user (both inks merge to create a black rectangle), but the barcode is visible under IR light, which makes it readable by the IR reader (scanner).