Colour Correction of Plastics

Colour correction is a term used to describe the effect observed when low concentrations of ultramarine blue or violet pigments are added to media, such as plastics, which possess an inherent yellowish tint. Even the most effective whiteners for plastics, such as titanium dioxide, show faint degrees of yellowness. Ultramarines and manganese violet pigments, when added in trace quantities, counteract yellowness to produce a neutral, or ‘whiter than white’ shade.

Benefits of ultramarine pigments in colour correction:-

· Enhanced whites
· Excellent natural and artificial light performance
· Range of subtle tints
· Precise shade control


Hide details for Excellent Day and Artificial Light PerformanceExcellent Day and Artificial Light Performance

Ultramarines and manganese violet do not exhibit fluorescence. Unlike optical brightening agents, they give improved performance both in daylight and under artificial illumination. Excellent lightfastness can also be achieved, even at extremely low concentrations.


Show details for Range of Subtle TintsRange of Subtle Tints

Hide details for Precise Shade ControlPrecise Shade Control

The exact pigment concentration needed to produce the desired level of colour correction depends on the initial degree of yellowness. Generally it is not necessary to use addition levels higher than 0.1% and often this figure is much lower. The moderate colour strength of ultramarine and manganese violet allows precise addition at various concentrations.