colour | Pigments
high performance, the NTP yellow is a go-to yellow pigment when all others do not meet performance requirements,” he says. A recent example of Shepherd Color’s work with
academia can be seen in the development of a new blue pigment in collaboration with Oregon State University chemist Mas Subramanian. The company says the new pigment, which is based on the elements yttrium, indium and manganese, produces a brilliant blue colour but its beauty is that it extends past the visible spec- trum into the near infrared. The benefit for compound formulators is that the new blue allows darker shades to be produced that stay cooler than standard blues.
Above: Users today are demanding improved functionality, according to Shepherd Color Company
pigment chemistries and works closely with both academia and industry to develop new and improved solutions. “NTP Yellow and RTZ Orange pigments have really found a place in engineering polymers. While catalysed by the continued move away from lead-based yellows, the NTP Yellow is the ultimate bright, chro- matic, durable colourant in the yellow colour space. While most would consider bismuth vanadate (PY184s)
Consistent performance Plastic compounders continue to seek suppliers that can provide colour consistency part-after-part together with an overall reduction of part colouring cost, according to US company Carolina Color. “Plastic compounders have also expressed the need for additional performance,” says a company spokesper- son. “For example, there is a need for cool pigments because they do not typically retain heat in plastic.
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