several transparent colored plastic resin granulates in test glasses

plastic polymer resin resins plastics pellets granulate glass testglass vitro background batch chemical color coloring colour compound compounding design dyed extrusion facility grained granules industrial industry injection lab laboratory mass masterbatch material molding particle pigment processing progress pvc raw recycling regranulate research science substance technology multicolored close colored test polyethylene polypropylene pmma styrol polystyrene polycarbonate beads moulding technical parts transparent granulates glasses factory batch masterbatch additive color dyed