blue, yellow, red granules of polypropylene, polyamide in a test tube and a petri dish. black background. plastic and polymer indu

background black blue caoutchouc chemistry chloride compound compounding density dish dye elastomer ethylene factory gel granulate granules hdpe indu industrial industry lab laboratory ldpe manufacturing material microplastic nitrile pellet petri petrochemicals pigment plastic polyamide polycarbonate polyethylene polymer polymers polypropylene polystyrene polythene polyvinyl primary production productsncopyspace pvc raw red research resin rubber science scientific technology test texture thermoplastic tpe tube yellow