New color concentrates give plastic parts an intriguing iridescent look. Light reflection, refraction, scat-tering, and transmissions interact and produce different colors when parts are viewed from different angles. The Tek-PEARLite FlipFlop concentrates are formulated for homopolymer polypropylene (PP), clarified PP, polyethylene, transparent poly-styrene and flexible PVC. They are suited for injection or blow molding and conventional extrusion.
Leco Plastics Inc., Hackensack, N.J., extruded decorative belts made from the concentrates. Company president Barry Schwartz says that a resin-to-concentrate ratio of 25:1 gave an extrusion color match that was highly reproducible. Complex geometries yield the most dramatic effects, he notes, especially those with multiple curves, recesses, and sharp angles.
Teknor Color Co., 505 Central Ave., Pawtucket, RI 02861, (401) 725-8000.