My husband works with textile products made from plastic, particularly color development for fibers from polypropylene and nylon. I asked him if I could show you a few of his pictures from work for the “plastic” photo hunt theme.
These are plastic color pellets that go into the fiber production (just as a clarification: these pellets just add the color. I don’t have a picture of what the plastic that the fiber comes from looks like):
Here are a few different color palettes of fiber samples:
And here is one finished carpet sample: