Special Effect Pigments - How Do They Differ From Regular Pigments?

In recent years, a whole new class of effect pigments consisting of platelet-like semi-transparent materials has been developed that do not exhibit a pearl luster and can no longer be categorised as metal effect pigments. These are referred to as special effect pigments and can create effects through multiple reflections followed by light interaction. This has led to a significant expansion of the spectrum of effects, which is why they are incorporated into the DIN, VDA and ASTM pigment classes.

These special effect pigments are based on non-metallic mineral mica that is coated with thin layers of refractive titanium dioxide. When white light hits these pigments, some is reflected from the internal boundaries of the platelet structure and some penetrates through to the binder. As a result, the color of the pigment appears iridescent or metallic. These pigments can be produced in a wide range of colors, ranging from metallic silver through to golden yellow.

Metallic effect pigments are particularly popular because they offer a unique, high-end look and add a sophisticated appeal to coatings and paints. In addition, they are easy to incorporate into formulations and can be formulated in many different ways – from subtle to startlingly eye-catching.

When it comes to formulating with these pigments, a few important rules must be followed in order to achieve the desired effect. For example, metallic effect pigments should be blended with chromatic pigments that have a relatively low chroma value, as they can easily turn to blueish hues when mixed with other colored pigments.