Transparent dichroic film. The reflected colours depend on the viewing angle. It is constructed from multiple layers of incredibly thin, vacuum deposition coating. Based on transparent polyester (PET) film, each layer reflects some of the light, causing light interference, which results in iridescent, shifting colour.
Dichroic film produces a myriad of reflected colours depending on the viewing angle. It is constructed from multiple layers of incredibly thin, vacuum deposition coating. This example is polyvinyl chloride (PVC) film with a black underside.