plastic pellets. polymeric dye. colorant for plastics in the granules

background bulb chemical chemistry color colorant coloring dye dyed extrusion factory for gloves grain grained granulate granule granules hdpe heap industrial industry injection isolated lab laboratory pellet pellets pet petrochemical pigment pink plastic plastics polyethylene polymer polymeric polypropylene polystyrene production pvc raw recycling regranulate research resin science substance technology thermoplastic white yellow