When the injection molding, paint a narrow slice through the entrance into the mold, its viscosity is quite large, the strong resistance of the pigment to the sheet resistance shape into the mold, often upright inflows. (Injection masterbatch)
Pearlescent pigments such as flakes no longer neatly arranged like tiles, the emitted light is also inconsistent. It will leave streaks on dark flow injection surface. Since the pearlescent pigments are transparent, so it leaves streaks lighter in color. Other metallic pigment has such a phenomenon, because of its opacity leave streaks color would be more obvious,
In addition, when pigment flakes flowing through the die at the barriers, such as holes, column position, paint chips will join the other side, leaving a dark bonding wire, sometimes because the object had cooled before the rendezvous, leaving the viscosity is too large due, which produce the pigment disorder results orientation.
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