several colored plastic resins test tubes laboratory |
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navigate by keyword : plastic polymer resin resins plastics pellets granulate glass testglass vitro test 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 tubes variations madley medley variation blue transparent red yellow green |
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a variation of different colored plastic resins in test tubes in laboratory |
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