plastic pellets. white colorant for plastics, in test-tube against a yellow background. plastic raw material

against agent background black chemical chemistry color colorant coloring dye extrusion factory for grain granulate granules hdpe heap industrial industry isolated lab laboratory ldpe material molding pattern pellets pet petrochemical pigment plastic plastics polyethylene polymer polymeric polypropylene polystyrene production pvc qms raw resin science technology testtube thermoplastic tinted white yellow