I could be wrong, but this seems like they are using an IR camera, then inverting the images once they are taken.
If they had a specific type of plastic, it is unlikely they would need to produce the multitude of objects they did. Why on earth would they bother with some of those?
If they had a specific type of plastic, it is unlikely they would need to produce the multitude of objects they did. Why on earth would they bother with some of those?