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Cabot's BLACK PEARLS® range of molding pigments — BLACK PEARLS 800, BLACK PEARLS 4840 and BLACK PEARLS 900 — offer a differentiated selection for injection molded engineering polymers. Each grade meets a particular performance attribute for molded engineering plastics applications:

  • Color Strength: a measure of the total visible light absorbency of the pigmented molded polymer part. For more details, see the "Color Measurement" brochure.
  • Blue Tone: is defined as the undertone of the molded part measured by the b* value in CIELAB coordinates, e.g. the b* value. For more details, see the "Color Measurement" brochure
  • Masterbatch Dilutability: the ease with which the pigment is released by the masterbatch carrier resin and is evenly distributed in the dilution resin.
  • UV Stability: is defined as the exposure time in an Atlas Ci65A accelerated weathering chamber required to reach 50% of the initial elongation at break.
  • Dispersability: ease with which the pigment can be wetted with the resin and subsequently de-agglomerated.

To help you understand the performance of these products, we have developed an animated product selector. Performance improves from chart center.