i felt like the article describes a whole bunch of the details – e.g. covering the plastic with vaporized aluminum (i believe this is what "aluminum-metalized p

i felt like the article describes a whole bunch of the details – e.g. covering the plastic with vaporized aluminum (i believe this is what "aluminum-metalized polyethylene terephthalate" means); making plastic iridescent by etching microscopic patterns into the plastic and exploiting the way light refracts off of those; maybe others that i can't remember now. but to me that wasn't as interesting as the part where the glitter industry turned out to be weirdly secretive about the whole process.