In injection molding, a plasticized polymer mass is injected into a tool. When cooled, it solidifies to form a molded part. It is usually colored completely using a masterbatch or compound.
In injection molding, flow processes in the molten mass cause the orientation of pigment platelets. By an technically well engineered tool construction the Effect pigments can orientate perfectly and showing nearly no flowline or welding effects. Another point to optimize the effect appearance is the position of the injection gate. Circular, centralized and edge minimized forms are perfectly suited for Effect pigments. In cases, where this is not possible we recommend, using our Miraval® Effect pigment series in a low concentration. It shows a strong sparkling effect and decreases the optical perception of irregularities.